Part 1. Definition
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.
Part 2. Example
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 a moderately priced coffee shop'
System: 'Are you looking for somewhere near a particular venue? For example, Cambridge Contemporary Art, Great Saint Mary's Church, or Primavera.'
User: 'no im not'
System: 'Cafe Eleven, which is in the moderate price range, is an outstanding cafe.'
User: 'can i get the phone number and the postcode'
System: 'The phone number of Cafe Eleven is 01223369157. It's in the area with the postcode CB1 1DG.'
User: 'thank you goodbye'

Answer: Moderate
Explanation: The user mentions that they are looking for a moderately priced coffee shop.
Part 3. Exercise
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: 'can i have a cheap restaurant in the fen ditton area'
System: 'What part of town do you have in mind? For example, something in the Arbury, Girton, or riverside area.'
User: 'in the fen ditton area'
System: 'Are you looking for somewhere near a particular venue? For example, Holy Trinity Church, the Regency Gallery, or Wandlebury Country Park.'
User: 'no'
System: 'What part of town do you have in mind? For example, Castle Hill, or Fen Ditton.'
User: 'fen ditton'
System: 'What type of food would you like? For example, American, Middleeastern, or Seafood.'
User: 'i dont care'
System: 'La Raza is an outstanding restaurant and it's in the cheap price range.'
User: 'can i have the phone number'
System: 'Let me confirm. You don't care about the food and you are looking for a venue.'
User: 'yes'
System: 'Are you looking for a pub or a restaurant?'
User: 'a cheap restaurant in the fen ditton area'
System: 'The phone number of La Raza is 01223464550.'
User: 'what is the area'
System: 'La Raza is in the central part of town.'
User: 'what is the area'
System: 'La Raza is in the central part of town.'
User: 'unintelligible'
System: 'La Raza is an outstanding restaurant.'
User: 'what is the postcode'
System: 'La Raza is in the area with the postcode CB2 3LL.'
User: 'what is the price range'
System: 'La Raza is in the cheap price range.'
User: 'is it in the fen ditton area'
System: 'La Raza is in the central part of town.'
User: 'thank you good bye'

Answer:
Cheap