generate response: Sorry, I'm departing from london liverpool street.. Intent: find_train. Slots: train-day=saturday, train-departure=london liverpool street, train-destination=cambridge, train-leaveat=16:00
Response: There are four trains on Saturday with that route that leave after 16:00. Your options are 17:39, 19:39, 21:39 and 23:39. The duration of the ride is 88 minutes.