Hello how may I help you? Can you help me with the NYC subway system? Yes how can I help I'm currently at a yellow line station, but there's no train information. When is it supposed to start running? The first train at yellow line will be at 6 a.m. Is there any reason it's not running right now? Yes the last train departed 15 minutes ago from that station Ah, so I just missed it. When's the next green line train? It departs in 15 minutes Great, thanks for that info Welcome