user_turns: <SILENCE> <SILENCE> <SILENCE> <SILENCE> id like to find a restaurant in the north part of town and it should serve greek food <SILENCE> <SILENCE> <SILENCE> can i get the phone number <SILENCE> 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? api_call R_cuisine R_location R_price bangkok_city is a great restaurant api_call R_cuisine north R_price meghna is in the north part of town . Sorry there is no greek restaurant in the north of town hakka is a nice restaurant in the north of town serving chinese food The phone number of hakka is hakka_phone hakka is a nice restaurant in the north of town serving chinese food  you are welcome