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: 'i need an english restaurant and it should have expensive price range'
System: 'The Backstreet Bistro, which serves contemporary food, is an outstanding restaurant. It serves english food and it's in the expensive price range.'
User: 'great can i have the number and area please'
System: 'The phone number of the Backstreet Bistro is 01223306306. The price for main courses ranges from 10 pounds 95 to 14 pounds 25.'
User: 'noise sil'
System: 'The Backstreet Bistro is a great restaurant.'
User: 'noise sil'
System: 'The Backstreet Bistro is a great restaurant, it serves contemporary and english food and it's in the expensive price range.'
User: 'noise sil'
System: 'The Backstreet Bistro, which serves contemporary food, is an outstanding restaurant. This place, which serves english food, is in the expensive price range.'
User: 'can i have the can i have the number and the area please'
System: 'There is no restaurant in the Girton area and serving english food.'
User: 'can i have the number and area please'
System: 'Would you like a girton area, or you don't care?'
User: 'can i have the phone number'
System: 'Would you like a girton area, or you don't care?'
User: 'phone number'
System: 'Would you like a girton area, or you don't care?'
User: 'i dont care'
System: 'Would you like an english food, or you don't care?'
User: 'i dont care'
System: 'The phone number of the Backstreet Bistro is 01223306306.'
User: 'english restaurant'
System: 'Would you like an english food, or you don't care?'
User: 'address please'
System: 'Would you like an english food, or you don't care?'
User: 'english restaurant and the address'
System: 'The Backstreet Bistro is on 2 Sturton Street.'
User: 'and post code'
System: 'The Backstreet Bistro is in the area with the postcode CB1 2QA.'
User: 'very good thank you good bye'

Answer:
Expensive