потерял..

Hotel/HotelDataModels/Models/IConferenceBookingModel.cs

@@ -5,6 +5,7 @@
         int? ConferenceId { get; }
         int HeadwaiterId { get; }
         DateTime? BookingDate { get; }
+        string NameHall { get; }
         public Dictionary<int, ILunchModel> ConferenceBookingLunches { get; }
     }
 }