generate response: I need the train to leave after 21:15. I also need it booked for two people.. Intent: book_train. Slots: train-bookpeople=2, train-day=thursday, train-departure=birmingham new street, train-destination=cambridge, train-leaveat=21:15
Response: How about train TR7324 that leaves at 21:40 and arrives by 24:23. Would you like to make reservations on that?