diff --git a/src/main/kotlin/de/thm/mni/ii/classroom/controller/ClassroomApiController.kt b/src/main/kotlin/de/thm/mni/ii/classroom/controller/ClassroomApiController.kt
index b47d099..4e7c6ea 100644
--- a/src/main/kotlin/de/thm/mni/ii/classroom/controller/ClassroomApiController.kt
+++ b/src/main/kotlin/de/thm/mni/ii/classroom/controller/ClassroomApiController.kt
@@ -48,7 +48,7 @@ class ClassroomApiController(
             }.map {
                 val refreshToken = generateRefreshToken(auth.principal)
                 // Set refresh_token header
-                val refreshTokenSet = setHeader("refresh_token", refreshToken, originalExchange)
+                val refreshTokenSet = setHeader("refreshToken", refreshToken, originalExchange)
                 // Set Authorization header
                 setHeader(HttpHeaders.AUTHORIZATION, "Bearer ${auth.credentials}", refreshTokenSet).response
             }.doOnNext {
@@ -61,7 +61,7 @@ class ClassroomApiController(
     fun refreshToken(
         auth: ClassroomAuthentication,
         originalExchange: ServerWebExchange,
-        @RequestHeader("refresh_token") refreshToken: String
+        @RequestHeader("refreshToken") refreshToken: String
     ): Mono<ServerHttpResponse> {
         return classroomTokenRepository
             .findRefreshToken(refreshToken)
@@ -71,18 +71,23 @@ class ClassroomApiController(
             }.switchIfEmpty(Mono.error(UnauthorizedException("Owner of refresh token does not match requester!")))
             .map { user ->
                 val newRefreshToken = generateRefreshToken(user)
-                Pair(user, setHeader("refresh_token", newRefreshToken, originalExchange))
+                Pair(user, setHeader("refreshToken", newRefreshToken, originalExchange))
             }.flatMap { (user, exchange) ->
                 Mono.zip(jwtService.createToken(user), Mono.just(exchange))
             }.map { (jwt, exchange) ->
                 setHeader(HttpHeaders.AUTHORIZATION, "Bearer $jwt", exchange).response
             }.doOnNext {
                 logger.info("${auth.principal} refreshed his JWT!")
+            }.onErrorResume { error ->
+                logger.error(error.message)
+                originalExchange.response.statusCode = HttpStatus.BAD_REQUEST
+                originalExchange.response.bufferFactory().wrap(error.message!!.encodeToByteArray())
+                Mono.just(originalExchange.response)
             }
     }
 
     private fun generateRefreshToken(userCredentials: UserCredentials): String {
-        val newRefreshToken = RandomStringUtils.randomAscii(30)
+        val newRefreshToken = RandomStringUtils.randomAlphanumeric(30)
         classroomTokenRepository.insertRefreshToken(newRefreshToken, userCredentials)
         return newRefreshToken
     }
diff --git a/web-gui/src/app/dialogs/create-conference-dialog/create-conference-dialog.component.html b/web-gui/src/app/dialogs/create-conference-dialog/create-conference-dialog.component.html
index 53c15e5..aeaa5cb 100644
--- a/web-gui/src/app/dialogs/create-conference-dialog/create-conference-dialog.component.html
+++ b/web-gui/src/app/dialogs/create-conference-dialog/create-conference-dialog.component.html
@@ -1,9 +1,9 @@
-<h2 mat-dialog-title>Neue Konferenz erstellen</h2>
-<div class="dialog">
+<div class="container">
+  <div class="dialogTitle" matDialogTitle>Neue Konferenz erstellen</div>
   <mat-dialog-content>
-    <form [formGroup]="form" class="grid-container">
+    <form [formGroup]="form">
       <mat-form-field appearance="fill">
-        <mat-label>Konferenz Name</mat-label>
+        <mat-label>Konferenzname</mat-label>
         <input matInput type="text" [formControl]="conferenceSubject" required>
       </mat-form-field>
       <div class="checkbox-form">
@@ -12,8 +12,8 @@ <h2 mat-dialog-title>Neue Konferenz erstellen</h2>
       </div>
     </form>
   </mat-dialog-content>
-  <mat-dialog-actions>
-    <button class="mat-raised-button" (click)="close()">Schließen</button>
-    <button class="mat-raised-button mat-primary" (click)="createConference()">Erstellen</button>
-  </mat-dialog-actions>
+  <mat-action-row>
+    <button mat-raised-button (click)="close()">Schließen</button>
+    <button mat-raised-button class="mat-primary" (click)="createConference()">Erstellen</button>
+  </mat-action-row>
 </div>
diff --git a/web-gui/src/app/dialogs/create-conference-dialog/create-conference-dialog.component.scss b/web-gui/src/app/dialogs/create-conference-dialog/create-conference-dialog.component.scss
index fe08f57..154d1c1 100644
--- a/web-gui/src/app/dialogs/create-conference-dialog/create-conference-dialog.component.scss
+++ b/web-gui/src/app/dialogs/create-conference-dialog/create-conference-dialog.component.scss
@@ -2,6 +2,28 @@ button {
   margin: 3px;
 }
 
+.container {
+  width: 20rem;
+
+}
+
+form {
+  display: flex;
+  flex-direction: column;
+}
+
 mat-dialog-content {
-  display: unset;
+  width: 20rem;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+}
+
+.checkbox-form {
+  margin-bottom: 10px;
+}
+
+mat-action-row {
+  width: unset;
+  margin-top: 10px;
 }
diff --git a/web-gui/src/app/dialogs/create-edit-ticket/create-edit-ticket.component.html b/web-gui/src/app/dialogs/create-edit-ticket/create-edit-ticket.component.html
index 478b0ba..62196e1 100644
--- a/web-gui/src/app/dialogs/create-edit-ticket/create-edit-ticket.component.html
+++ b/web-gui/src/app/dialogs/create-edit-ticket/create-edit-ticket.component.html
@@ -1,12 +1,13 @@
-<h2 mat-dialog-title>{{title}}</h2>
-
-<mat-dialog-content [formGroup]="form">
-  <mat-form-field appearance="standard">
-    <mat-label>Beschreibung</mat-label>
-    <textarea maxlength="160" formControlName="desc" matInput required cdkTextareaAutosize></textarea>
-  </mat-form-field>
-</mat-dialog-content>
-<mat-dialog-actions>
-  <button class="mat-raised-button" (click)="close()">Schließen</button>
-  <button class="mat-raised-button mat-primary" (click)="editTicket()">Erstellen</button>
-</mat-dialog-actions>
+<div class="container">
+  <div class="dialogTitle" matDialogTitle>{{title}}</div>
+  <mat-dialog-content [formGroup]="form">
+    <mat-form-field appearance="standard">
+      <mat-label>Beschreibung</mat-label>
+      <textarea maxlength="160" formControlName="desc" matInput required cdkTextareaAutosize></textarea>
+    </mat-form-field>
+  </mat-dialog-content>
+  <mat-action-row>
+    <button mat-raised-button (click)="close()">Schließen</button>
+    <button mat-raised-button class="mat-primary" (click)="editTicket()">Erstellen</button>
+  </mat-action-row>
+</div>
diff --git a/web-gui/src/app/dialogs/link-conference-to-ticket-dialog/link-conference-to-ticket-dialog.component.html b/web-gui/src/app/dialogs/link-conference-to-ticket-dialog/link-conference-to-ticket-dialog.component.html
index a445439..bacf162 100644
--- a/web-gui/src/app/dialogs/link-conference-to-ticket-dialog/link-conference-to-ticket-dialog.component.html
+++ b/web-gui/src/app/dialogs/link-conference-to-ticket-dialog/link-conference-to-ticket-dialog.component.html
@@ -9,7 +9,7 @@
     </app-choose-conference-dialog>
   </mat-dialog-content>
   <mat-action-row>
-    <button color="primary" mat-flat-button (click)="newConference()">Neue Konferenz</button>
-    <button color="warn" mat-flat-button (click)="close()">Abbrechen</button>
+    <button color="primary" mat-raised-button (click)="newConference()">Neue Konferenz</button>
+    <button color="warn" mat-raised-button (click)="close()">Abbrechen</button>
   </mat-action-row>
 </div>
diff --git a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-assign/ticket-assign.component.html b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-assign/ticket-assign.component.html
index b398416..12fb448 100644
--- a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-assign/ticket-assign.component.html
+++ b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-assign/ticket-assign.component.html
@@ -1,23 +1,28 @@
-<mat-select [disabled]="!classroomService.isCurrentUserPrivileged()" [(ngModel)]="assigneeId" class="user-select" (ngModelChange)="assignUser()">
-  <mat-select-trigger class="user-select">
-    <ng-container *ngIf="this.assigneeId !== '†none'; then userDisplay else assign"></ng-container>
-  </mat-select-trigger>
-  <mat-option value="†none">
-    <ng-container *ngTemplateOutlet="assign"></ng-container>
-  </mat-option>
-  <mat-option *ngFor="let supervisor of this.users" [value]="supervisor.userId">
-    <app-ticket-user-display label="" [user]="supervisor"></app-ticket-user-display>
-  </mat-option>
-</mat-select>
+<div class="ticket-user">
+  <mat-select [disabled]="!classroomService.isCurrentUserPrivileged()" [(ngModel)]="assigneeId" class="user-select" (ngModelChange)="assignUser()">
+    <mat-select-trigger class="user-select">
+      <ng-container *ngIf="this.assigneeId !== '†none'; then userDisplay else assign"></ng-container>
+    </mat-select-trigger>
+    <mat-option value="†none">
+      <ng-container *ngTemplateOutlet="assign"></ng-container>
+    </mat-option>
+    <mat-option *ngFor="let supervisor of this.users | isPrivileged" [value]="supervisor.userId">
+      <app-ticket-user-display label="" [user]="supervisor"></app-ticket-user-display>
+    </mat-option>
+  </mat-select>
+</div>
 
 <ng-template #assign>
   <div class="assign-user" *ngIf="this.classroomService.isCurrentUserPrivileged()">
-    <mat-icon class="assign-icon">add_circle_outline</mat-icon>&nbsp;
+    <mat-icon class="assign-icon">add_circle_outline</mat-icon>
     <span class="assign-text">zuweisen</span>
   </div>
   <div class="assign-user" *ngIf="!this.classroomService.isCurrentUserPrivileged()">
-    <mat-icon class="assign-icon">person_off</mat-icon>&nbsp;
-    <span class="assign-text"> n/a </span>
+    <mat-icon class="assign-icon">person_off</mat-icon>
+    <div class="user-text">
+      <span class="label">zugewiesen</span>
+      <span class="user-name">Niemand</span>
+    </div>
   </div>
 </ng-template>
 
diff --git a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-assign/ticket-assign.component.scss b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-assign/ticket-assign.component.scss
index 7f71295..4eba8c4 100644
--- a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-assign/ticket-assign.component.scss
+++ b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-assign/ticket-assign.component.scss
@@ -2,12 +2,7 @@
   display: flex;
   flex-flow: row nowrap;
   align-items: center;
-  min-width: 132px;
-  height: 38px;
-}
-
-.user-select {
-  min-width: 132px;
+  width: 210px;
   height: 38px;
 }
 
@@ -62,3 +57,6 @@ mat-select-trigger {
   display: none;
 }
 
+.container {
+  width: 100%;
+}
diff --git a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-user-display/ticket-user-display.component.scss b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-user-display/ticket-user-display.component.scss
index bcd46e1..9c71898 100644
--- a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-user-display/ticket-user-display.component.scss
+++ b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket-user-display/ticket-user-display.component.scss
@@ -3,6 +3,7 @@
   flex-flow: row nowrap;
   align-items: center;
   min-width: 132px;
+  max-width: 200px;
   height: 38px;
   .user-avatar {
     height: 32px;
diff --git a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.html b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.html
index 8d80d88..ffd288d 100644
--- a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.html
+++ b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.html
@@ -9,18 +9,17 @@
       <p class="ticket-time">{{this.getTicketTime(ticket)}}</p>
     </div>
   </div>
-  <div class="ticket-row ticket-details">{{ticket.description}}</div>
   <div class="ticket-row">
-    <div class="ticket-users ticket-row">
+    <div class="ticket-users">
       <app-ticket-assign label="zugewiesen" [ticket]="ticket" [users]="this.users"></app-ticket-assign>
       <app-ticket-user-display label="ersteller" [user]="this.fullUser(this.ticket.creator)"></app-ticket-user-display>
     </div>
-    <div class="ticket-buttons" [ngSwitch]="determineButton()">
+    <div *ngIf="mayDeleteTicket()" class="ticket-buttons" [ngSwitch]="determineButton()">
       <ng-container *ngSwitchCase="'invite'" [ngTemplateOutlet]="inviteToConferenceTemplate"></ng-container>
       <ng-container *ngSwitchCase="'join'" [ngTemplateOutlet]="joinConferenceTemplate"></ng-container>
       <ng-container *ngSwitchCase="'link'" [ngTemplateOutlet]="linkConferenceTemplate"></ng-container>
-      <mat-icon class="edit-icon functional-icon" (click)="this.editTicket()">edit</mat-icon>
-      <mat-icon class="delete-icon functional-icon" (click)="this.closeTicket()">delete</mat-icon>
+      <mat-icon *ngIf="mayEditTicket()" class="edit-icon functional-icon" (click)="this.editTicket()">edit</mat-icon>
+      <mat-icon *ngIf="mayDeleteTicket()" class="delete-icon functional-icon" (click)="this.closeTicket()">delete</mat-icon>
     </div>
   </div>
 </mat-card-content>
diff --git a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.scss b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.scss
index 83ac3ed..1450d8f 100644
--- a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.scss
+++ b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.scss
@@ -22,6 +22,13 @@ mat-card-content {
     font-size: 14px;
     color: #6D6D6D;
   }
+  .ticket-users {
+    display: flex;
+    flex-flow: row nowrap;
+    justify-content: space-between;
+    align-items: center;
+    padding-left: 5px;
+  }
   .ticket-meta {
     alignment: left;
     width: 78px;
diff --git a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.ts b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.ts
index 5dcabc1..71c8555 100644
--- a/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.ts
+++ b/web-gui/src/app/page-components/classroom/ticket-list/ticket/ticket.component.ts
@@ -43,6 +43,15 @@ export class TicketComponent implements OnInit {
       return "invite"
   }
 
+  public mayDeleteTicket(): boolean {
+    return this.classroomService.isSelf(this.ticket?.creator!!) ||
+      this.classroomService.isCurrentUserPrivileged()
+  }
+
+  public mayEditTicket(): boolean {
+    return this.classroomService.isSelf(this.ticket?.creator!!)
+  }
+
   editTicket() {
     this.classroomService.createOrEditTicket(this.ticket)
   }
diff --git a/web-gui/src/app/page-components/menu-bar/menu-bar.component.html b/web-gui/src/app/page-components/menu-bar/menu-bar.component.html
index cec4181..74f6ec8 100644
--- a/web-gui/src/app/page-components/menu-bar/menu-bar.component.html
+++ b/web-gui/src/app/page-components/menu-bar/menu-bar.component.html
@@ -3,8 +3,8 @@
     <mat-icon>supervised_user_circle</mat-icon> {{parseCourseRole(currentUser?.userRole)}}
   </div>
 
-  <div class="menu-bar-section">
-    <mat-icon>meeting_room</mat-icon> {{classroomInfo?.classroomName}}
+  <div class="menu-bar-section room-label" >
+    <mat-icon>meeting_room</mat-icon> <span class="room-name">{{classroomInfo?.classroomName}}</span>
   </div>
 
   <div class="menu-bar-section" (click)="this.toggleMenu()">
diff --git a/web-gui/src/app/page-components/menu-bar/menu-bar.component.scss b/web-gui/src/app/page-components/menu-bar/menu-bar.component.scss
index 669c919..4fd73bb 100644
--- a/web-gui/src/app/page-components/menu-bar/menu-bar.component.scss
+++ b/web-gui/src/app/page-components/menu-bar/menu-bar.component.scss
@@ -10,12 +10,12 @@
   align-items: center;
   padding: 5px 5px;
   box-shadow: none;
-  border: 1px solid rgba(0, 0, 0, 0.12);
 
   .menu-bar-section {
     display: flex;
     flex-flow: row nowrap;
     align-items: center;
+    justify-content: space-evenly;
     margin: 0 5px 0 5px;
   }
 
@@ -26,12 +26,11 @@
   }
 }
 
-mat-icon {
-  /* Adjust these values accordingly */
-  left: 0;
-  right: 0;
+.room-name {
+  margin-left: 3px;
 }
 
+
 .user-avatar {
   position: relative;
   margin-right: 8px;
diff --git a/web-gui/src/app/service/auth.service.ts b/web-gui/src/app/service/auth.service.ts
index fad619c..8234dcd 100644
--- a/web-gui/src/app/service/auth.service.ts
+++ b/web-gui/src/app/service/auth.service.ts
@@ -31,10 +31,10 @@ export class AuthService {
   }
 
   private static extractRefreshTokenFromHeader(response: HttpResponse<any>): string {
-    if (!response.headers.has('refresh_token')) {
-      throw Error("No refresh_token token in HttpResponse!")
+    if (!response.headers.has('refreshToken')) {
+      throw Error("No refreshToken token in HttpResponse!")
     }
-    return response.headers.get('refresh_token')!!;
+    return response.headers.get('refreshToken')!!;
   }
 
   /**
@@ -93,7 +93,7 @@ export class AuthService {
   }
 
   public requestNewToken() {
-    const headers = new HttpHeaders().set('refresh_token', this.loadRefreshToken())
+    const headers = new HttpHeaders().set('refreshToken', this.loadRefreshToken())
     return this.http.get<void>('/classroom-api/refresh', {headers: headers, observe: 'response'})
       .pipe(
         tap(res => AuthService.storeToken(AuthService.extractJwtFromHeader(res))),
diff --git a/web-gui/src/app/service/classroom.service.ts b/web-gui/src/app/service/classroom.service.ts
index d3e8483..730445b 100644
--- a/web-gui/src/app/service/classroom.service.ts
+++ b/web-gui/src/app/service/classroom.service.ts
@@ -210,14 +210,6 @@ export class ClassroomService {
     return user.conferences.length !== 0
   }
 
-  public findOrCreateConferenceOfTicket(ticket: Ticket): ConferenceInfo {
-    let conference = this.findConferenceOfTicket(ticket)
-    if (conference === undefined) {
-      conference = this.configureNewConferenceForTicket(ticket)
-    }
-    return conference
-  }
-
   public createNewConferenceForTicket(ticket: Ticket): Observable<ConferenceInfo> {
     const info = this.configureNewConferenceForTicket(ticket)
     return this.conferenceService.createConference(info).pipe(