public IActionResult Index(int showtimeId, string errorMessage = "") { var viewModel = new BookingViewModel(); viewModel.ErrorMessage = errorMessage; viewModel.Seats = _service.GetSeatsForShowtime(showtimeId); viewModel.Showtime = _service.GetShowtime(showtimeId); viewModel.Movie = viewModel.Showtime.Movie; viewModel.Screen = viewModel.Showtime.Screen; return(View(viewModel)); }