generate response: i want to travel on sunday. i need to leave cambridge at 20:00.. Intent: find_train. Slots: restaurant-area=north, restaurant-bookday=sunday, restaurant-bookpeople=2, restaurant-booktime=18:00, restaurant-food=asian oriental, restaurant-name=saigon city, restaurant-pricerange=expensive, train-day=sunday, train-departure=cambridge, train-destination=ely, train-leaveat=20:00
Response: TR0537 leaves at 21:50 and arrives in 17 minutes. Do you want tickets for that?