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 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: 'sil'
System: 'What kind of venue are you looking for? For example, a pub, or a restaurant.'
User: 'a restaurant in the trumpington area'
System: 'What kind of price range are you looking for? For example, expensive, or free.'
User: 'expensive'
System: 'What kind of price range are you looking for? For example, cheap, expensive, or free.'
User: 'expensive'
System: 'Are you looking for somewhere near a particular venue? For example, All Saints Church, the Book and Print Gallery, or Williams Art and Antiques.'
User: 'sil'
System: 'Are you looking for somewhere near a particular venue? For example, Byard Art, Christ's College, or the Museum of Classical Archaeology.'
User: 'trumpington'
System: 'What type of food would you like? For example, Drinks and snacks only, Chinese, or Greek.'
User: 'sil'
System: 'What type of food would you like? For example, Continental, or Turkish.'
User: 'trumpington'
System: 'What type of food would you like? For example, Continental, Greek, or Seafood.'
User: 'i dont care'
System: 'Can I help you with anything else?'
User: 'i dont care'
System: 'Can I help you with anything else?'
User: 'yes'
System: 'Are you looking for somewhere near a particular venue? For example, Great Saint Mary's Church, Jesus College, or the Whipple Museum.'
User: 'yes'
System: 'Are you looking for somewhere near a particular venue? For example, the People's Portraits Exhibition, Saint Catharine's College, or Wandlebury Country Park.'
User: 'no'
System: 'The Oak Bistro is an outstanding restaurant, it's in the Trumpington part of town and it's in the expensive price range.'
User: 'no'
System: 'The phone number of The Oak Bistro is 01223323361.'
User: 'thank you goodbye'

Example Output: Expensive

Example 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: 'im looking for an expensive restaurant in the fen ditton area'
System: 'The Riverside Restaurant, which is in the Fen Ditton part of town, is a great restaurant. It's in the expensive price range.'
User: 'what type of food do they have'
System: 'The Riverside Restaurant serves contemporary food.'
User: 'whats the phone number'
System: 'The phone number of the Riverside Restaurant is 01223418997.'
User: 'what is the address'
System: 'The Riverside Restaurant is on Cambridge Regional College, Newmarket Road.'
User: 'thank you goodbye'

Example Output: Expensive

Example 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: 'unitelligible'
System: 'What kind of price range are you looking for? For example, cheap, expensive, or free.'
User: 'im looking for a cheap restaurant in the cherry hinton area'
System: 'What type of food would you like? For example, Cafe food, French, or Seafood.'
User: 'sil'
System: 'Are you looking for somewhere near a particular venue? For example, Cambridge Contemporary Art, the Museum of Archaelogy and Anthropology, or Saint Catharine's College.'
User: 'unintelligible'
System: 'What type of food would you like? For example, Northern european, English, or Spanish.'
User: 'sil'
System: 'What type of food would you like? For example, Drinks and snacks only, French, or Italian.'
User: 'dont care'
System: 'Are you looking for a pub or a restaurant?'
User: 'dont care'
System: 'Are you looking for a pub or a restaurant?'
User: 'a restaurant'
System: 'What type of food would you like? For example, pub, International, or Turkish.'
User: 'sil'
System: 'Are you looking for somewhere near a particular venue? For example, the Museum Of Technology, the Folk Museum, or King's College.'
User: 'dont care'
System: 'Spice Merchants, which is in the Cherry Hinton part of town, is a great restaurant. It's in the cheap price range.'
User: 'sil'
System: 'Spice Merchants, which is in the Cherry Hinton part of town, is an outstanding restaurant. It's in the cheap price range.'
User: 'whats the address'
System: 'Spice Merchants is located on 60 Trumpington Road.'
User: 'whats the address'
System: 'Spice Merchants is located on 60 Trumpington Road.'
User: 'whats the phone number'
System: 'The phone number of Spice Merchants is 01223843436.'
User: 'whats the phone number'
System: 'The phone number of Spice Merchants is 01223843436.'
User: 'thank you goodbye'

Example Output:
Cheap