user_turns: <SILENCE> a restaurant christmas food italian food west any <SILENCE> phone number phone number thank you goodbye
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? I'm sorry but there is no restaurant serving christmas food There are restaurants serving italian food . What area do you want? There are restaurants serving italian in the west of town . What price range would you like? api_call italian west R_price prezzo is a nice place in the west of town serving tasty italian food prezzo is a great restaurant The phone number of prezzo is prezzo_phone  you are welcome