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: 'background noise'
System: 'What kind of price range are you looking for? For example, cheap, free, or moderate.'
User: 'background noise'
System: 'What kind of venue are you looking for? For example, a pub, or a restaurant.'
User: 'background noise'
System: 'Are you looking for a venue that allows children?'
User: 'unintelligible restaurant'
System: 'Are you looking for a pub or a restaurant?'
User: 'fusion restaurant'
System: 'What type of food would you like? For example, Continental, Fastfood, or Turkish.'
User: 'whispering'
System: 'What type of food would you like? For example, Cafe food, Seafood, or Traditional.'
User: 'fusion'
System: 'What kind of price range are you looking for? For example, cheap, or moderate.'
User: 'unintelligible'
System: 'The Dojo Noodle Bar is an outstanding restaurant. It serves fusion food. It's in the cheap price range.'
User: 'fusion unintelligible'
System: 'The Dojo Noodle Bar, which serves fusion food, is a great restaurant. It's in the cheap price range.'
User: 'phone number and address'
System: 'The Dojo Noodle Bar is on Miller's Yard and its phone number is 01223363471.'
User: 'background noise'
System: 'The Dojo Noodle Bar is an outstanding restaurant.'
User: 'background noise'
System: 'The Dojo Noodle Bar is a great restaurant.'
User: 'background noise'
System: 'The Dojo Noodle Bar is a great restaurant.'
User: 'thank you good bye'

Example Output: 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: 'cough'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'expensive restaurant in addenbrookes area'
System: 'What kind of price range are you looking for? For example, cheap, or expensive.'
User: 'expensive'
System: 'What type of food would you like? For example, Contemporary, Middleeastern, or Traditional.'
User: 'middle eastern'
System: 'Are you looking for a pub or a restaurant?'
User: 'restaurant'
System: 'Are you looking for somewhere near a particular venue? For example, Artworks, Emmanuel College, or Pembroke College.'
User: 'addenbrookes brookes area'
System: 'Are you looking for somewhere near a particular venue? For example, Castle Galleries, the Gallery at twelve A High Street, or the Ruskin Gallery.'
User: 'no'
System: 'The Lucky Star, which is in the Addenbrooke's part of town, is an outstanding restaurant. It's in the expensive price range.'
User: 'address'
System: 'The Lucky Star is on Unit.'
User: 'phone number'
System: 'The phone number of the Lucky Star is 01223244277.'
User: 'thank you goodbye cough'

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 english restaurant in the high price range'
System: 'What kind of price range are you looking for? For example, expensive, or free.'
User: 'unintelligible'
System: 'What kind of price range are you looking for? For example, cheap, or moderate.'
User: 'unintelligible'
System: 'What kind of price range are you looking for? For example, expensive, or moderate.'
User: 'expensive'
System: 'The Backstreet Bistro is a great restaurant, it serves contemporary and english food and it's in the expensive price range.'
User: 'expensive'
System: 'The Backstreet Bistro is an outstanding venue. The price for main courses ranges from 10 pounds 95 to 14 pounds 25.'
User: 'expensive expensive'
System: 'The Backstreet Bistro is a great restaurant, it serves contemporary food, it serves english food and it's in the expensive price range.'
User: 'what is the area and address'
System: 'The Backstreet Bistro is located on 2 Sturton Street and it's in the Romsey part of town.'
User: 'sil'
System: 'The Backstreet Bistro is an outstanding restaurant.'
User: 'what is the area'
System: 'The Backstreet Bistro is in the Romsey part of town.'
User: 'what is the address'
System: 'The Backstreet Bistro is on 2 Sturton Street.'
User: 'thank you goodbye'

Example Output:
Expensive

