generate response: Actually, I don't need a hotel. I do need a train to Ely on Sunday, though. I'll be leaving from Cambridge after 17:45.. Intent: find_train. Slots: train-day=sunday, train-departure=cambridge, train-destination=ely, train-leaveat=17:45
Response: The first train to leave after 17:45 leaves at 17:50. Would you like to me to book that for you?