            styleClass="ui-button-warning mx-1" 
                                             oncomplete="PF('ChannelRoomNumberChange').show()" 
                                             disabled="#{bookingController.selectedSessionInstance == null}" />

                        </div>
                    </div>
                </f:facet>

                <!--                <p:dialog widgetVar="startSessionWarn" modal="true" header="Session Started" draggable="false" resizable="false">
                  