generate response: No, I don't. Can you give me the earliest departure out of the 4 trains?. Intent: find_train. Slots: train-arriveby=09:15, 9:15, train-day=friday, train-departure=cambridge, train-destination=stansted airport
Response: TR7213 leaves cambridge at 05:40 and arrives at the airport by 06:08, does this suit your needs?