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: 'clicking sil'
System: 'What kind of venue are you looking for? For example, a cafe, or a pub.'
User: 'clicking sil'
System: 'What kind of venue are you looking for? For example, a cafe, or a pub.'
User: 'cafe'
System: 'What type of food would you like? For example, Drinks and snacks only, English, or Fastfood.'
User: 'cafe food'
System: 'What kind of price range are you looking for? For example, cheap, or free.'
User: 'fast food'
System: 'Would you like fastfood or X food?'
User: 'cheap'
System: 'Would you like fastfood or X food?'
User: 'cheap'
System: 'Would you like fastfood or X food?'
User: 'unintelligible food'
System: 'Would you like fastfood or X food?'
User: 'x food'
System: 'Would you like fastfood or X food?'
User: 'x food'
System: 'The Cambridge Blue, which is in the cheap price range, is a great cafe.'
User: 'unintelligible food'
System: 'There is no cafe serving fastfood.'
User: 'phone number'
System: 'The Cambridge Blue is located on 24 Regent Street and its phone number is 01223369222.'
User: 'phone number'
System: 'The phone number of the Cambridge Blue is 01223369222.'
User: 'thank you good bye'


Solution: Cheap