Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Input:  Person1:       Hello , are you interested in this Honda ? 
 Person2:Hi , I am just looking . 
 Person1:        It's a good car . 
 Person2:What year is it ? 
 Person1:        1999 . 
 Person2:How about the mileage ? 
 Person1:        6,000 miles , all highway mileage . 
 Person2:What do you mean 7B 
 Person1:        Highway miles are not as bad as local miles . They do not hurt car as much . 
 Person2:Oh , why such a high mileage ? 
 Person1:        The owner was commuting everyday crossing the state line . 
 Person2:Okay . Does this car have a warranty ? 
 Person1:        One month . 
 Person2:How do I make sure I am not buying a junk ? 
 Person1:        You'll check it out anyway you want . You can take it to a garage . 
 Person2:How much is it ? 
 Person1:        $ 5,900 . 
 Person2:I'll have to think about it . 
 Person1:        Leave your phone number , and I will give you a call if the price gets reduced . 
 Person2:Okay . 

formal