user_turns: <SILENCE> <SILENCE> uh i want cantonese food <SILENCE> cantonese how about thai food what type of food whats the address and phone number <SILENCE> 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? api_call cantonese R_location R_price thanh_binh serves vietnamese food I'm sorry but there is no restaurant serving cantonese food thanh_binh is a great restaurant thanh_binh serves vietnamese food The phone number of thanh_binh is thanh_binh_phone thanh_binh is a great restaurant  you are welcome