I'd like a train to Cambridge that arrives by 11:30. Where are you departing from? I'm departing from Ely. I can reserve a seat on TR2704 departing at 9:35 and arriving in Cambridge at 9:52. How many tickets will you need? It doesn't matter to me. If you wouldn't like me to book you a ticket, is there anything else you need? Can you tell me what the travel time for that train is? That will be a 17 minute train ride.