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.

[EX Q]: 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: 'unintelligible'
System: 'What kind of price range are you looking for? For example, expensive, free, or moderate.'
User: 'unintelligible'
System: 'What kind of price range are you looking for? For example, expensive, or free.'
User: 'a cheap price range'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'unintelligible'
System: 'What kind of venue are you looking for? For example, a pub, or a restaurant.'
User: 'unintelligible'
System: 'Are you looking for a venue with an internet connection?'
User: 'cafe food restaurant'
System: 'Are you looking for a pub or a restaurant?'
User: 'restaurant cafe food restaurant'
System: 'Subway, which serves cafe food, is a great restaurant. It's in the cheap price range.'
User: 'was the address and post code'
System: 'Subway, which is in the area with the postcode CB1 2AD, is located on 40-42 Mill Road. The price for main courses ranges from 1 pound 99 to 5 pounds 60.'
User: 'thank you goodbuy'

[EX A]: Cheap

[EX Q]: 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'
System: 'What kind of venue are you looking for? For example, a cafe.'
User: 'for a restaurant unintelligible0'
System: 'What type of food would you like? For example, Contemporary, Greek, or Traditional.'
User: 'traditional'
System: 'What part of town do you have in mind? For example, something in the central, King's Hedges, or Trumpington area.'
User: 'breathing'
System: 'What part of town do you have in mind? For example, something in the Castle Hill, New Chesterton, or Trumpington area.'
User: 'is it expensive price range'
System: 'The Riverside Restaurant, which serves traditional food, is a great restaurant. It's in the expensive price range.'
User: 'and the address'
System: 'The Granta Bar is on University Centre, Granta Place and its phone number is 01223902174. The price for main courses ranges from 14 pounds 95 to 16 pounds 95.'
User: 'and postcode of the venue'
System: 'The Riverside Restaurant is in the area with the postcode CB2 1RU.'
User: 'thank you good bye'

[EX A]: Expensive

[EX Q]: 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: 'noise sil'
System: 'What kind of venue are you looking for? For example, a cafe, or a restaurant.'
User: 'fast food restaurant cheap price range'
System: 'Burger King is an outstanding restaurant, it serves fastfood and it's in the cheap price range.'
User: 'address'
System: 'Burger King is located on The Grafton Centre. The price for main courses ranges from 1 pound 99 to 6 pounds 79.'
User: 'knock sil'
System: 'Burger King is a great restaurant.'
User: 'thank you good bye'

[EX A]:
Cheap