generate response: I need to leave Cambridge and get to London Kings Cross before 12:45.. Intent: find_train. Slots: train-arriveby=12:45, train-day=wednesday, train-departure=cambridge, train-destination=london kings cross
Response: TR 9781 is the train closest to that time, gets you there at 11:51. That should give you time to check out the shops. Shall I book you?