generate response: I'll be traveling on Saturday, please. Oh and I don't want to leave too early, let's say something after 17:45.. Intent: find_train. Slots: train-day=saturday, train-departure=london liverpool street, train-destination=cambridge, train-leaveat=17:45
Response: The first train after 17:45 from London Liverpool Street to Cambridge leaves at 19:39 and arrives at 21:07. Would that be to your liking?