generate response: I'm going from Cambridge to the Stansted Airport.. Intent: find_train. Slots: train-arriveby=12:15, train-day=friday, train-departure=cambridge, train-destination=stansted airport
Response: The TR5998 leaves cambridge at 10:40 and arrives stansted airport at 12:08. It's price is 10.10 pounds. There are earlier trains if you wish.