private void CancelTable(object obj)
 {
     if (BookingDetail.BookingId != Guid.Empty)
     {
         ReservationServiceClient client = new ReservationServiceClient();
         client.CancelTableReservationCompleted += client_CancelTableReservationCompleted;
         client.CancelTableReservationAsync(BookingDetail.BookingDate, BookingDetail.BookingId);
         RefreshEvent.Instance.Publish(bookingDetail);
     }
 }