generate response: Of course, silly me. I'd like to travel from Cambridge to London Liverpool Street on Saturday, and I need to get there by 19:00 please.. Intent: find_train. Slots: train-arriveby=19:00, train-day=saturday, train-departure=cambridge, train-destination=london liverpool street
Response: Allright. TR0357 departs at 09:39. Would you like me to book you tickets?