generate response: I would like to leave after 09:15. I'd like the travel time, ID and price please. Intent: find_train. Slots: train-day=tuesday, train-departure=cambridge, train-destination=london kings cross, train-leaveat=09:15
Response: I have train TR2643 leaving at 15:00 arriving at 15:51 travel time 51 minutes with a price of 23.60 pounds.