generate response: I don't have an arrival preference.. Intent: find_train. Slots: train-arriveby=13:00, train-day=tuesday, train-departure=cambridge, train-destination=broxbourne
Response: The earliest train leaves at 5:01. The latest train leaving by 13:00 would depart at 12:01. There is also one that leaves at 13:01. The trains run every hour.