generate response: I need to leave Saturday and must arrive by 20:00. I don't care what time the train leaves as long as I arrive on time.. Intent: find_train. Slots: train-arriveby=20:00, train-day=saturday, train-departure=stevenage, train-destination=cambridge, train-leaveat=dontcare
Response: I have train TR2442 leaving stevenage at 17:54 and arriving in cambridge at 18:43. Would you like to book this?