generate response: That's all I need. Thanks.. Intent: book_train. Slots: restaurant-bookday=friday, restaurant-bookpeople=1, restaurant-booktime=20:00, restaurant-name=graffiti, train-arriveby=18:30, train-day=thursday, train-departure=london kings cross, train-leaveat=05:17
Response: OK. I'm sorry I wasn't able to get you into the restaurant you wanted. Your train TR2512 is leaving at 13:17. Let me know if you ever need anything else.