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: 'contemporary restaurant'
System: 'What kind of price range are you looking for? For example, cheap, expensive, or moderate.'
User: 'cheap'
System: 'Let me confirm. You are looking for a venue in the cheap price range.'
User: 'yes'
System: 'All Bar One, which serves contemporary food, is a great restaurant. It's in the cheap price range.'
User: 'phone number and price'
System: 'The phone number of All Bar One is 01223371081. The price for main courses ranges from 7 pounds 95 to 12 pounds 95 and the price for a glass of wine ranges from 2 pounds 85 to 6 pounds 95.'
User: 'thank you good bye'

Cheap

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 want to find a expensive restaurant near romsey area'
System: 'The Backstreet Bistro, which is in the Romsey part of town, is a great restaurant. It's in the expensive price range.'
User: 'okay can i get the address the phone number and the postcode'
System: 'The Backstreet Bistro is on 2 Sturton Street. Its phone number is 01223306306. It's in the area with the postcode CB1 2QA.'
User: 'of the restaurant'
System: 'What part of town do you have in mind? For example, something in the Castle Hill, central, or King's Hedges area.'
User: 'i want to find it near romsey area'
System: 'The Backstreet Bistro is a great restaurant and it's in the Romsey part of town. It's in the expensive price range.'
User: 'sil'
System: 'What part of town do you have in mind? For example, something in the Chesterton, Girton, or riverside area.'
User: 'which is nearer to romsey area'
System: 'The Backstreet Bistro is in the Romsey part of town.'
User: 'can i get the address the phone number and the postcode'
System: 'The Backstreet Bistro, which is in the area with the postcode CB1 2QA, is located on 2 Sturton Street. Its phone number is 01223306306.'
User: 'thank you goodbye'

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: 'pub food restaurant'
System: 'Would you like a cheap price range, or you don't care?'
User: 'expensive price range'
System: 'Revolution is an outstanding restaurant and it serves pub food. It's in the expensive price range.'
User: 'noise'
System: 'What part of town do you have in mind? For example, Romsey, or Trumpington.'
User: 'what is the address'
System: 'Revolution is on 3-7 Downing Street. The price for main courses ranges from 6 pounds 45 to 9 pounds 95 and the price for a cheapest glass of wine is 10 pounds.'
User: 'what is the phone number'
System: 'The phone number of Revolution is 01223364895.'
User: 'thank you goodbye'


Expensive