user_turns: <SILENCE> <SILENCE> north christmas <SILENCE> hello address phone number price range 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 part of town do you have in mind? What kind of food would you like? api_call R_cuisine north R_price golden_wok is a nice place in the north of town saigon_city is a nice place in the north of town Sure , saigon_city is on saigon_city_address The phone number of saigon_city is saigon_city_phone saigon_city is in the expensive price range  you are welcome