generate response: I'm hoping for a train to bishops stortford after 21:15.. Intent: find_train. Slots: train-day=saturday, train-departure=cambridge, train-destination=bishops stortford, train-leaveat=21:15
Response: There are 2 trains that fit this request. One at 21:29 and another at 23:29. Did you want me to book one of them for you?