generate response: I'll be leaving cambridge on Tuesday and need a booking.. Intent: book_train. Slots: train-bookpeople=7, train-day=tuesday, train-departure=cambridge, train-destination=bishops stortford, train-leaveat=08:30, 8:30
Response: Ok, the first train after 8:30 is TR1562 and it leaves at 09:29, shall I book you?