public void displayScreen() {
        System.out.println("Select One of the following by its integer value");
        System.out.println("1. Add type of a room");
        System.out.println("2. Delete type of a room");
        System.out.println("3. Add a room");
        System.out.println("4. Delete a room");
        System.out.println("5. View Booking Status");
        System.out.println("6. Update Booking Status");
        System.out.println("7. View Service Request");
        System.out.println();
        System.out.println("0. Exit");
        System.out.println();
        System.out.print("Enter choice: ");

    }