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: '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'

[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: 'i need a mexican texmex restaurant'
System: 'What kind of price range are you looking for? For example, cheap, free, or moderate.'
User: 'expensive price range'
System: 'What kind of price range are you looking for? For example, cheap, or expensive.'
User: 'expensive'
System: 'What kind of price range are you looking for? For example, cheap, or expensive.'
User: 'expensive'
System: 'Are you looking for somewhere near a particular venue? For example, the Book and Print Gallery, Corpus Christi, or Magdalene College.'
User: 'no'
System: 'Nanna Mexico is an outstanding restaurant and it serves mexican and tex mex food. It's in the expensive price range.'
User: 'i do need the address though'
System: 'Nanna Mexico is located on 33 Regent Street. The price for main courses ranges from 5 pounds 35 to 15 pounds 50 and the price for a cappuccino is 2 pounds 95.'
User: 'what is the phone number'
System: 'The phone number of Nanna Mexico is 01223902150.'
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: 'background noise'
System: 'What kind of venue are you looking for? For example, a cafe, or a pub.'
User: 'moderate coffee shop in the city center area'
System: 'Let me confirm. You are looking for a venue in the central area.'
User: 'coffee shop in the city center area'
System: 'Carringtons, which is a great cafe and an outstanding restaurant, is in the central part of town. It's in the moderate price range.'
User: 'can i have the address'
System: 'Carringtons is located on 23 Market Street.'
User: 'can i have the phone number please'
System: 'The phone number of Carringtons is 01223361792.'
User: 'thank you good bye'

[EX A]:
Moderate