generate response: I'm looking for a train to Stansted Airport that departs on Wednesday. It needs to arrive by 17:30.. Intent: find_train. Slots: train-arriveby=17:30, train-day=wednesday, train-departure=cambridge, train-destination=stansted airport
Response: I have many that will arrive by that time, but the closest to that actual time is TR2912, departing cambridge at 16:40 and arriving at stansted at 17:08.