Detailed Instructions: The input is a conversation between an automated system and a user looking for suggestions for pubs, restaurants and coffee shops in Cambridge. In the dialogue, the user may provide some criteria for the type of place they want such as price range, cuisine, etc. Given such a dialogue, output the price range the user if looking for which can take one of four values: Cheap, Moderate, Expensive and Don't Care. Output cannot be any other value than the four values. Note that if the user asks for the prices of items provided at a pub, restaurant or coffee shop but doesn't mention the price range they are looking for then the correct classification will be Don't Care. If the user does not mention a particular price, the correct classification will be Don't Care.
Problem: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'

Solution:
Expensive