TASK 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.
PROBLEM: 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'


SOLUTION: Expensive

PROBLEM: 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 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 cafe, a pub, or a restaurant.'
User: 'noise sil'
System: 'Can I help you with anything else?'
User: 'restaurant in the chesterton area breathing'
System: 'There is no restaurant in the Chesterton area and serving east asian food.'
User: 'unintelligible'
System: 'Can I help you with anything else?'
User: 'thank you good bye'


SOLUTION: Moderate

PROBLEM: 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: 'hello um im looking for a restaurant somewhere in the addenbrookes area id like to find an inexpensive restaurant and i need to get the address of that restaurant and the prices'
System: 'The Peking Restaurant, which is in the Addenbrooke's part of town, is a great restaurant. It's in the cheap price range.'
User: 'can you give me the address'
System: 'The Peking Restaurant is on Unit 3, The Belvedere, Homerton Street. The price for main courses ranges from 3 pounds to 9 pounds.'
User: 'can you give me the price in u s dollars'
System: 'The Peking Restaurant is a great venue. The price for main courses ranges from 3 pounds to 9 pounds.'
User: 'ok thank you good bye'


SOLUTION:
Cheap