generate response: Yes, may I get travel time in minutes? I am also looking for a restaurant that is expensive and serve afghan food.. Intent: find_train. Slots: restaurant-food=afghan, restaurant-pricerange=expensive, train-day=sunday, train-departure=stansted airport, train-destination=cambridge, train-leaveat=14:00
Response: The duration of that train is 28 minutes. There aren't any restaurants meeting those specifications.