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.
Input: 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: 'background noise'
System: 'What kind of venue are you looking for? For example, a cafe, or a restaurant.'
User: 'coffee shop'
System: 'What kind of price range are you looking for? For example, cheap, or free.'
User: 'background noise'
System: 'What kind of price range are you looking for? For example, cheap, or moderate.'
User: 'cheap'
System: 'What part of town do you have in mind? For example, something in the Arbury, Fen Ditton, or New Chesterton area. I can't hear you. What part of town do you have in mind? For example, something in the Arbury, Fen Ditton, or New Chesterton area.'
User: 'arbury'
System: 'Are you looking for somewhere near a particular venue? For example, the Folk Museum, Little Saint Mary's, or Trinity College.'
User: 'no'
System: 'What part of town do you have in mind? For example, something in the central, New Chesterton, or Romsey area.'
User: 'central'
System: 'Are you looking for a cafe or a restaurant?'
User: 'coffee shop'
System: 'What part of town do you have in mind? For example, Castle Hill, or Girton.'
User: 'castle hill'
System: 'What type of food would you like? For example, Drinks and snacks only, or English.'
User: 'drink'
System: 'What part of town do you have in mind? For example, something in the Chesterton, Newnham, or Trumpington area.'
User: 'good bye'

Output:
Cheap