generate response: I need to arrive in Cambridge by 17:30, so whatever arrives closest to that time would be great.. Intent: find_train. Slots: train-arriveby=17:30, train-day=wednesday, train-departure=ely, train-destination=cambridge
Response: The train arriving closest to 17:30 in Cambridge Wednesday is TR2211, which arrives at 15:52. Would you like to book a seat?