generate response: I should have told you that already, I apologize. I need to take a train from cambridge to london kings cross, on thursday leaving after 15:00.. Intent: find_train. Slots: train-day=thursday, train-departure=cambridge, train-destination=london kings cross, train-leaveat=15:00
Response: There are trains meeting those requirements leaving at 15:00, 17:00, 19:00, 21:00, 23:00. They all take 51 minutes and cost 23.60 pounds.