private static void ShowInterface(IRoomView roomView, IReservationView reservationView, IEmployeeView employeeView)
        {
            Console.WriteLine("Main menu");
            Console.WriteLine("1. Room management");
            Console.WriteLine("2. Reservation management");
            Console.WriteLine("3. Employee management");
            var choice = Console.ReadLine();

            switch (choice)
            {
            case "1":
                roomView.ShowMenu();
                break;

            case "2":
                reservationView.ShowMenu();
                break;

            case "3":
                employeeView.ShowMenu();
                break;

            case "20":
                return;

            default:
                break;
            }
            ShowInterface(roomView, reservationView, employeeView);
        }