user_turns: <SILENCE> <SILENCE> <SILENCE> start over expensive restaurant serving christmas food british food british east <SILENCE> phone number phone number <SILENCE> good bye
system_turns: Hello , welcome to the Cambridge restaurant system . You can ask for restaurants by area , price range or food type . How may I help you ? What kind of food would you like? You are looking for a restaurant serving any kind of food right? What part of town do you have in mind? There are restaurants serving any kind of food in the expensive price range . What area would you like? I'm sorry but there is no restaurant serving christmas food Could you please repeat that? There are restaurants serving british in the expensive price range . What area would you like? api_call british east expensive grafton_hotel_restaurant is a great restaurant serving expensive british food in the east of town . grafton_hotel_restaurant is a great restaurant The phone number of grafton_hotel_restaurant is grafton_hotel_restaurant_phone Sorry but there is no other british restaurant in the expensive price range and the east of town  you are welcome