generate response: A later train would be better, what trains arrive around 20:00?. Intent: find_train. Slots: train-arriveby=20:45, train-day=saturday, train-departure=cambridge, train-destination=birmingham new street
Response: The closest arrival to 20:00 is TR2815, departing at 18:01 and arriving at 19:44. There is also one arriving at 20:44. Would that be preferable?