user_turns: <SILENCE> i want to find a restaurant serving world food how about spanish food right <SILENCE> what is the address what is the 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 ? I'm sorry but there is no restaurant serving world food You are looking for a spanish restaurant right? api_call spanish R_location R_price la_tasca serves spanish food Sure , la_tasca is on la_tasca_address la_tasca is in the moderate price range  you are welcome