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 Input:
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 price range are you looking for? For example, cheap, expensive, or moderate.'
User: 'background noise'
System: 'What kind of venue are you looking for? For example, a cafe, or a pub.'
User: 'background noise'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'east asian restaurants'
System: 'What kind of price range are you looking for? For example, cheap, free, or moderate.'
User: 'east asian restaurants'
System: 'What kind of price range are you looking for? For example, expensive, free, or moderate.'
User: 'east asian restaurants'
System: 'What kind of price range are you looking for? For example, cheap, or moderate.'
User: 'background noise'
System: 'What kind of price range are you looking for? For example, cheap, or moderate.'
User: 'background noise'
System: 'What kind of price range are you looking for? For example, expensive, free, or moderate.'
User: 'east asian'
System: 'What kind of price range are you looking for? For example, cheap, or free.'
User: 'east asian restaurant'
System: 'What kind of price range are you looking for? For example, cheap, or expensive.'
User: 'cheap'
System: 'There is no restaurant serving east asian food in the cheap price range.'
User: 'cheap'
System: 'There is no restaurant serving east asian food in the cheap price range.'
User: 'background noise'
System: 'Would you like an east asian food, or you don't care?'
User: 'thank you good bye'


Ex Output:
Don't Care


Ex Input:
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 thai restaruant and it should have an exp expensive price range'
System: 'What part of town do you have in mind? For example, something in the Addenbrooke's, Barnwell, or Cherry Hinton area.'
User: 'i dont care'
System: 'The Wrestlers is an outstanding restaurant, it serves thai food and it's in the expensive price range.'
User: 'great can i get the address phone number and post code'
System: 'The Wrestlers, which is in the area with the postcode CB5 8JE, is located on 337 Newmarket Road. Its phone number is 01223566554. The price for main courses ranges from 8 pounds 50 to 9 pounds 70 and the price for a cheapest pint of beer is 3 pounds 30.'
User: 'thank you good bye'


Ex Output:
Expensive


Ex Input:
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: 'noise sil'
System: 'What kind of price range are you looking for? For example, free, or moderate.'
User: 'expensive'
System: 'Can I help you with anything else?'
User: 'expensive'
System: 'What kind of price range are you looking for? For example, cheap, expensive, or free.'
User: 'expensive'
System: 'Can I help you with anything else?'
User: 'expensive'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'noise sil'
System: 'What kind of venue are you looking for? For example, a pub.'
User: 'restaurant'
System: 'What part of town do you have in mind? For example, something in the Barnwell, Fen Ditton, or Newnham area.'
User: 'romsey'
System: 'Are you looking for somewhere near a particular venue? For example, Saint John's College, Sidney Sussex College, or Williams Art and Antiques.'
User: 'noise sil'
System: 'What part of town do you have in mind? For example, something in the Arbury, Newnham, or riverside area.'
User: 'romsey'
System: 'Can I help you with anything else?'
User: 'expensive restaruan in the romsey area'
System: 'The Backstreet Bistro is a great restaurant, it's in the Romsey part of town and it's in the expensive price range.'
User: 'what is the address'
System: 'The Backstreet Bistro is located on 2 Sturton Street.'
User: 'what is the phone number'
System: 'The phone number of the Backstreet Bistro is 01223306306.'
User: 'what is the price'
System: 'The Backstreet Bistro is a great venue. The price for main courses ranges from 10 pounds 95 to 14 pounds 25.'
User: 'thank you good bye'


Ex Output:

Expensive


