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.
Example: 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 a moderately priced coffee shop'
System: 'Are you looking for somewhere near a particular venue? For example, Cambridge Contemporary Art, Great Saint Mary's Church, or Primavera.'
User: 'no im not'
System: 'Cafe Eleven, which is in the moderate price range, is an outstanding cafe.'
User: 'can i get the phone number and the postcode'
System: 'The phone number of Cafe Eleven is 01223369157. It's in the area with the postcode CB1 1DG.'
User: 'thank you goodbye'

Example solution: Moderate
Example explanation: The user mentions that they are looking for a moderately priced coffee shop.

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: 'restaurant'
System: 'What kind of price range are you looking for? For example, cheap, free, or moderate.'
User: 'expensive'
System: 'Are you looking for somewhere near a particular venue? For example, Churchill College, Magdalene College, or Old Schools.'
User: 'col magdalene college'
System: 'Are you looking for a pub or a restaurant?'
User: 'restaurant'
System: 'What type of food would you like? For example, pub, French, or Greek.'
User: 'french'
System: 'Are you looking for somewhere near a particular venue? For example, Kettle's Yard, the Lynne Strover Gallery, or Trinity College.'
User: 'trinity college'
System: 'What part of town do you have in mind? For example, Addenbrooke's, or Fen Ditton.'
User: 'fen ditton'
System: 'What part of town do you have in mind? For example, something in the central, Fen Ditton, or King's Hedges area.'
User: 'fen ditton'
System: 'Let me confirm. You don't care about the area and you are looking for a venue.'
User: 'yes'
System: 'The Hotel du Vin is an outstanding restaurant. It serves french food. It's in the expensive price range.'
User: 'unintelligible'
System: 'The Hotel du Vin is an outstanding venue. The price for main courses ranges from 17 pounds to 25 pounds.'
User: 'address'
System: 'The Hotel du Vin is on 15-19 Trumpington Street.'
User: 'unintelligible'
System: 'The Hotel du Vin is an outstanding restaurant.'
User: 'unintelligible'
System: 'The Hotel du Vin is an outstanding restaurant.'
User: 'unintelligible'
System: 'The Hotel du Vin is a great restaurant.'
User: 'unintelligible'
System: 'The Hotel du Vin is an outstanding restaurant, it serves french food and it's in the expensive price range.'
User: 'address'
System: 'The Hotel du Vin is located on 15-19 Trumpington Street.'
User: 'thank you goodbye'


Solution: Expensive