user_turns: <SILENCE> im looking for a restaurant in the south part of town that serves vietnamese food <SILENCE> is there an indian restaurant in the south of town <SILENCE> what is the telephone number 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 ? api_call vietnamese south R_price Sorry there is no vietnamese restaurant in the south of town api_call indian south R_price taj_tandoori is a nice restaurant in the south of town serving indian food The phone number of taj_tandoori is taj_tandoori_phone  you are welcome