generate response: Can I please have one at 19:40. I will get there by 21:30 correct?. Intent: find_train. Slots: train-arriveby=21:30, train-day=thursday, train-departure=cambridge, train-destination=stansted airport, train-leaveat=19:40
Response: Yes, the 19:40 train will arrive at 20:08. How many tickets would you like?