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: 'sil'
System: 'What kind of venue are you looking for? For example, a pub, or a restaurant.'
User: 'sil'
System: 'Can I help you with anything else?'
User: 'fast food restaurant'
System: 'Let me confirm. You are looking for a seafood venue.'
User: 'fast food restaurant'
System: 'Let me confirm. You are looking for a cafe food venue.'
User: 'fast food'
System: 'Burger King is a great restaurant and it serves fastfood.'
User: 'fast food'
System: 'Burger King, which serves fastfood, is an outstanding restaurant.'
User: 'phone number and postcode'
System: 'The phone number of Burger King is 01223322666 and it's in the area with the postcode CB1 1PS.'
User: 'phone number'
System: 'The phone number of Burger King is 01223322666.'
User: 'thank you goodbye'
Question: 'Did the user ask for the phone number of the restaurant?'

Output (English): Yes