user_turns: <SILENCE> thai food <SILENCE> expensive price range <SILENCE> address phone number 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 ? api_call thai R_location R_price sala_thong serves thai food . api_call thai R_location expensive sala_thong is in the expensive price range Sure , sala_thong is on sala_thong_address The phone number of sala_thong is sala_thong_phone  you are welcome