user_turns: <SILENCE> cheap restaurant mexican chinese <SILENCE> phone number and 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 cheap mexican food api_call chinese R_location cheap the_lucky_star is a great restaurant serving cheap chinese food in the south of town . The phone number of the_lucky_star is the_lucky_star_phone  you are welcome