generate response: No thanks, I need a train from cambridge to stevenage in Tuesday. I want to arrive before 21:00. Intent: find_train. Slots: restaurant-area=north, restaurant-food=indian, restaurant-pricerange=cheap, train-arriveby=21:00, train-day=tuesday, train-departure=cambridge, train-destination=stevenage
Response: Ok, TR6692 leaves Cambridge at 19:21 and arrives in Stevenage at 20:10. Will this work for you?