public static void addCustomer(TravelAgent agent){
		System.out.println(" ---- Add Customer ---- \n" +
						"Please enter in customer name >>: ");
		input.nextLine();
		String name = input.nextLine();
		System.out.print("Please enter the number of child seats >>: ");
		int numChildSeats = input.nextInt();
		System.out.print("Please enter the number of adult seats >>: ");
		int numAdultSeats = input.nextInt();
		// create new customer from input to new customer object
		Customer customer = new Customer(name, numChildSeats, numAdultSeats);
		// calls the method to add the newly created customer to current list
		agent.createCustomer(customer);
		// output confirmation
		System.out.println("Added customer " + customer.name + " to list. Return to menu...");
		System.out.println();
		// back to add menu
		addMenu(agent);
		
	}