generate response: I'm going to Cambridge and I'll be at london kings cross.. Intent: find_train. Slots: train-day=sunday, train-departure=london kings cross, train-destination=cambridge, train-leaveat=18:00
Response: You have a choice of three trains. One leaves at 19:17, one at 21:17, and one at 23:17. Will any of these three trains work for you?