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: 'cheap restaurant in fen ditton area'
System: 'The Milton Park English and Thai Restaurant is an outstanding restaurant, it's in the Fen Ditton part of town and it's in the cheap price range.'
User: 'address'
System: 'The Milton Park English and Thai Restaurant is on Milton Park Golf Course, Ely Road, Milton.'
User: 'phone number'
System: 'The phone number of the Milton Park English and Thai Restaurant is 01223864602.'
User: 'thank you goodbye'
Question: 'Did the user ask for the phone number of the restaurant?'

Output (English): Yes