generate response: I'd like to leave Cambridge and arrive by 17:30.. Intent: find_train. Slots: train-arriveby=17:30, train-day=saturday, train-departure=cambridge, train-destination=bishops stortford
Response: I have the TR0121 train available. It departs from Cambridge at 15:29 and arrives at Bishops Stortford at 16:07. Would you like to book a ticket?