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: 'id like to find an expensive restaurant'
System: 'Are you looking for somewhere near a particular venue? For example, Cherry Hinton Water Play, Downing College, or King's College.'
User: 'and it should be in the castle hill area'
System: 'What type of food would you like? For example, Chinese take away, American, or Vegetarian.'
User: 'an expensive restaurant'
System: 'Are you looking for somewhere near a particular venue? For example, Cambridge Contemporary Art, or Kettle's Yard.'
User: 'french would be fine'
System: 'What part of town do you have in mind? For example, something in the Addenbrooke's, Arbury, or Fen Ditton area.'
User: 'castle hill'
System: 'Are you looking for somewhere near a particular venue? For example, Magdalene College, Saint Catharine's College, or Wandlebury Country Park.'
User: 'castle hill area'
System: 'What part of town do you have in mind? For example, something in the Cherry Hinton, Chesterton, or central area.'
User: 'castle hill area'
System: 'What part of town do you have in mind? For example, something in the Arbury, Girton, or New Chesterton area.'
User: 'castle hill'
System: 'What part of town do you have in mind? For example, central, or King's Hedges.'
User: 'castle hill'
System: 'Are you looking for somewhere near a particular venue? For example, the Broughton House, or the Museum of Archaelogy and Anthropology.'
User: 'i would like to find an expensive restaurant'
System: 'Are you looking for somewhere near a particular venue? For example, All Saints Church, the Museum Of Technology, or the Scott Polar Museum.'
User: 'do you have any french restaurants'
System: 'Are you looking for somewhere near a particular venue? For example, All Saints Church, the Museum Of Technology, or Pembroke College.'
User: 'technology'
System: 'The Hotel du Vin is a great restaurant, it serves french food and it's in the expensive price range.'
User: 'all saints church'
System: 'The Hotel du Vin is an outstanding restaurant, it serves french food and it's in the expensive price range.'
User: 'can i have the phone number and'
System: 'The phone number of the Hotel du Vin is 01223227330.'
User: 'postcode'
System: 'The Hotel du Vin is in the area with the postcode CB2 1QA.'
User: 'for the du vin could i have the unintelligible'
System: 'The Hotel du Vin is an outstanding restaurant.'
User: 'postcode'
System: 'The Hotel du Vin is in the area with the postcode CB2 1QA.'
User: 'could i have the post code please'
System: 'The Hotel du Vin is in the area with the postcode CB2 1QA.'
User: 'i'
System: 'The Hotel du Vin is an outstanding restaurant.'
User: 'and the hotel du vins phone number'
System: 'Would you like a french food, or you don't care?'
User: 'could i have the phone number please'
System: 'Would you like a french food, or you don't care?'
User: 'french food'
System: 'The phone number of the Hotel du Vin is 01223227330. It's in the area with the postcode CB2 1QA.'
User: 'french food'
System: 'The Hotel du Vin, which serves french food, is an outstanding restaurant. It's in the expensive price range.'
User: 'thank you and good bye'

Output: Expensive