generate response: No, just need to leave after 15:00. When will I arrive and how long does it take?. Intent: find_train. Slots: train-day=saturday, train-departure=peterborough, train-destination=cambridge, train-leaveat=15:00
Response: You have a few options. One train leaves at 15:19 and it's about a 50 minute trip, putting you in cambridge at 16:09. Should I book it for you?