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: 'sil'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'spanish restaurant'
System: 'What kind of price range are you looking for? For example, cheap, or free.'
User: 'restaurant'
System: 'What kind of price range are you looking for? For example, cheap, or moderate.'
User: 'cheap'
System: 'Let me confirm. You are looking for a venue in the cheap price range.'
User: 'cheap'
System: 'What type of food would you like? For example, Cafe food, Fastfood, or Greek.'
User: 'spanish'
System: 'Are you looking for somewhere near a particular venue? For example, All Saints Church, Cafe Jello, or the Ruskin Gallery.'
User: 'no'
System: 'What part of town do you have in mind? For example, something in the Addenbrooke's, Romsey, or Trumpington area.'
User: 'none'
System: 'What part of town do you have in mind? For example, Castle Hill, or Fen Ditton.'
User: 'none'
System: 'What part of town do you have in mind? For example, something in the Castle Hill, Newnham, or Romsey area.'
User: 'none'
System: 'What type of food would you like? For example, East asian, French, or Japanese.'
User: 'castle hill'
System: 'What part of town do you have in mind? For example, something in the Girton, New Chesterton, or Trumpington area.'
User: 'spanish'
System: 'There is no restaurant serving english food in the cheap price range.'
User: 'castle hill'
System: 'Let me confirm. You are looking for an english venue.'
User: 'goodbye'


SOLUTION: Cheap

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: 'breathing sil'
System: 'What kind of venue are you looking for? For example, a pub, or a restaurant.'
User: 'noise sil'
System: 'Are you looking for a cafe or a restaurant?'
User: 'clicking sil'
System: 'Let me confirm. You are looking for a thai venue.'
User: 'a unitelligible restaurant'
System: 'Let me confirm. You are looking for a thai venue.'
User: 'that is cheap'
System: 'Let me confirm. You are looking for a thai venue.'
User: 'knock sil'
System: 'What type of food would you like? For example, Mexican and Tex Mex, American, or Chinese.'
User: 'sea food'
System: 'There is no restaurant serving seafood in the cheap price range.'
User: 'sea food'
System: 'Would you like a seafood, or you don't care?'
User: 'i dont care'
System: 'What part of town do you have in mind? For example, something in the New Chesterton, Newnham, or Trumpington area.'
User: 'unintelligible 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: 'beep'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'background noise'
System: 'What kind of venue are you looking for? For example, a cafe, a pub, or a restaurant.'
User: 'cheap restaurant'
System: 'What type of food would you like? For example, Chinese take away, Northern european, or Greek.'
User: 'cheap restaurant'
System: 'What type of food would you like? For example, American, Japanese, or Thai.'
User: 'i dont care'
System: 'La Raza is an outstanding restaurant and it's in the cheap price range.'
User: 'castle hill area'
System: 'What part of town do you have in mind? For example, something in the central, Fen Ditton, or Trumpington area.'
User: 'castle hill area'
System: 'Subway is an outstanding restaurant and it's in the cheap price range.'
User: 'address'
System: 'Subway is on 40-42 Mill Road.'
User: 'phone number'
System: 'The phone number of Subway is 01223461323.'
User: 'price'
System: 'Subway is an outstanding venue. The price for main courses ranges from 1 pound 99 to 5 pounds 60.'
User: 'thank you good bye'


SOLUTION:
Cheap