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 an american restaurant and the price doesnt matter'
System: 'What kind of price range are you looking for? For example, cheap, expensive, or free.'
User: 'doesnt matter'
System: 'Are you looking for somewhere near a particular venue? For example, All Saints Church, Churchill College, or Pembroke College.'
User: 'no'
System: 'Gourmet Burger , which serves american food, is a great restaurant.'
User: 'what is the phone number'
System: 'The phone number of Gourmet Burger  is 01223312598. The price for main courses ranges from 3 pounds 95 to 8 pounds 45.'
User: 'thank you goodbye'
Question: 'Did the user ask for the phone number of the restaurant?'

Output (English): Yes