public static void mainMenu(TravelAgent agent){
		int userChoice = 0;
		System.out.print("---- Travel Console - " + agent.name + " - Main Menu ----" + "\n" +
						 "1) Add a new customer/flight/movie \n" +
						 "2) List a customer/flight/movie \n" +
						 "3) Delete a customer/flight/movie \n" +
						 "4) Book a flight for a customer \n" + 
						 "5) Quit \n" +
						 ">>: ");
		
		userChoice = input.nextInt();
		// if statement for menu choices
		if (userChoice == 1) {
			addMenu(agent);		//go to add object sub menu
		}
		else if (userChoice == 2){
			listMenu(agent);	// go to list object sub menu
		}
		else if (userChoice == 3){
			deleteMenu(agent);	// go to delete object sub menu
		}
		else if (userChoice == 4){
			bookMenu(agent);	// go to booking menu
		}
		else if (userChoice == 5){
			System.exit(0);		// quit system
		}
		
	}