private static void listFlights(TravelAgent agent) {
		System.out.println("Listing flights:");
		// business flight loop
		for (BusinessFlight b : agent.businessFlightList){
			System.out.println(b.flightNumber + "\t" + b.origin + "\t" + b.destination + "\t" + b.etd + "\t" + b.eta + "\t" + b.basePrice + "\t" + b.concession + "\t Business Flight");
		}
		// economy flight loop
		for (EconomyFlight e : agent.economyFlightList){
			System.out.println( e.flightNumber + "\t" + e.origin + "\t" + e.destination + "\t" + e.etd + "\t" + e.eta + "\t" + e.basePrice + "\t" + e.concession + "\t Economy Flight" );
		}
		listMenu(agent);
	}