er.selectedBillSession}" 
                                            filter="true" 
                                            var="bs" 
                                            scrollHeight="400"
                                            class="w-100 fullHeightListbox" >
                                            <f:selectItems value="#{bookingController.billSessions}" var="item" itemValue="#{item}" />
                                            <p:ajax process="lstBookings" update="panelSessionDet