user_turns: <SILENCE> restaurant south part of town christmas food christmas chinese <SILENCE> south part of town any <SILENCE> address address thank you 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? I'm sorry but there is no restaurant serving christmas food There are restaurants serving chinese food . What area do you want? What part of town do you have in mind? There are restaurants serving chinese in the south of town . What price range would you like? api_call chinese south R_price the_lucky_star is a nice place in the south of town serving tasty chinese food the_lucky_star is a great restaurant Sure , the_lucky_star is on the_lucky_star_address  you are welcome