generate response: I can't leave until after 17:45 and going to Cambridge. Intent: find_train. Slots: train-day=sunday, train-departure=bishops stortford, train-destination=cambridge, train-leaveat=17:45
Response: The first train that leaves after 17:45 leaves at 19:29 and would arrive by 20:07. Would you like me to book seats on train TR0053 for you?