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.

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: 'knock sil'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'expensive english restaurant'
System: 'Would you like turkish or X food?'
User: 'english'
System: 'What kind of price range are you looking for? For example, cheap, free, or moderate.'
User: 'expensive'
System: 'Would you like an expensive price range, or you don't care?'
User: 'yes'
System: 'Would you like an expensive price range, or you don't care?'
User: 'expensive'
System: 'The Backstreet Bistro, which serves contemporary and english food, is an outstanding restaurant. It's in the expensive price range.'
User: 'can i have the address'
System: 'The Backstreet Bistro is located on 2 Sturton Street.'
User: 'can i have the phone number'
System: 'The phone number of the Backstreet Bistro is 01223306306.'
User: 'can i have the post code'
System: 'The Backstreet Bistro is in the area with the postcode CB1 2QA.'
User: 'thank you good bye'

Expensive

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: 'yes id like to find a cafe food restaurant and it should have a moderate price range'
System: 'Carringtons is a great cafe, it serves cafe food and it's an outstanding restaurant. This place, which serves english food, is in the moderate price range.'
User: 'noise i want to know the address area and phone number of the location'
System: 'Carringtons is on 23 Market Street and its phone number is 01223361792.'
User: 'thank you good bye'

Moderate

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 restaurant.'
User: 'background noise'
System: 'What kind of venue are you looking for? For example, a pub, or a restaurant.'
User: 'restaurant'
System: 'What type of food would you like? For example, Drinks and snacks only, Spanish, or Thai.'
User: 'restaurants'
System: 'What part of town do you have in mind? For example, something in the central, King's Hedges, or New Chesterton area.'
User: 'cheap restaurant'
System: 'The Michaelhouse Centre, which doesn't charge any entrance fee, is a great restaurant.'
User: 'fen ditton'
System: 'The Michaelhouse Centre is a great restaurant.'
User: 'fen ditton'
System: 'The Michaelhouse Centre is an outstanding restaurant.'
User: 'thank you good bye'


Cheap