header="Confirmation" widgetVar="startSessionWarn" modal="true" resizable="false">
                    <p>Are you sure you want to start this channel session?</p>

                    <f:facet name="footer">
                        <p:commandButton
                            class="mx-2 ui-button-success"
                            ajax="false"
                            value="Yes"
                            action="#{bookingController.markSessionInstanceAsStarted()}"
                            onclic