Task: Dialogue State Tracking
Input (English): System: 'Thank you for calling the Cambridge Information system. Your call will be recorded for research purposes. You may ask for information about a place to eat, such as a restaurant, a pub, or a cafe. How may I help you?'
User: 'im looking for cafe food restaurant and i want it to be cheap'
System: 'Subway is a great restaurant, it serves cafe food and it's in the cheap price range.'
User: 'what area is it in'
System: 'Subway is in the riverside part of town.'
User: 'whats the phone number'
System: 'The phone number of Subway is 01223461323.'
User: 'thank you good bye'

Output (English): Cheap