generate response: I'd like to leave on tuesday after 21:15 and arrive at stevenage.. Intent: find_train. Slots: train-day=tuesday, train-departure=cambridge, train-destination=stevenage, train-leaveat=21:15
Response: I have train TR7822 that leaves Cambridge at 21:21 and gets to stevenage at 22:10, resulting in a 49 minute train ride. It costs 12.80 pounds.