user_turns: <SILENCE> i need a cheap restaurant <SILENCE> <SILENCE> <SILENCE> need it in north <SILENCE> 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 ? What kind of food would you like? What part of town do you have in mind? api_call R_cuisine R_location cheap nandos is a nice restaurant in the south of town in the cheap price range api_call R_cuisine north cheap da_vinci_pizzeria is a nice restaurant in the north of town in the cheap price range The phone number of da_vinci_pizzeria is da_vinci_pizzeria_phone  you are welcome