public IActionResult Detail(ReservationDeteailsViewModel m)
 {
     if (ModelState.IsValid)
     {
         // getting the New sitting ID based on its name
         Sitting s = _services.GetSittingByName(m.SittingName);
         // setting it to the model
         m.SittingID = s.SittingID;
         // using the model data to update the DB
         _services.UpdateReservation(m);
         // return to the Staf Page (Reservations list)
         return(RedirectToAction("Index"));
     }
     // stay in the details page if modelState is not valid
     return(View(m.ReservationID));
 }