generate response: It doesn't matter what time I leave as long as I arrive at the airport by 20:45.. Intent: find_train. Slots: train-arriveby=20:45, train-day=saturday, train-departure=cambridge, train-destination=stansted airport
Response: TR1703 leaves cambridge on sunday at 19:40 and arrives at stansted airport at 20:08. The cost is 8.08 pounds. Would you like me to book it for you?