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:       We've been cramming for tomorrow's history exam since early this morning . What do you say we take a break and listen to some music , okay ?  
 Person2:Now that you mention it , I'm getting a little bumed-out from studying nonstop , too . Listening to some music for a while would suit me just fine .  
 Person1:        While you're picking out a record to play , I'll grab a couple of beers out of the refrigerator .  
 Person2:You sure have a lot of discs here .  
 Person1:        Yeah , I've got everything from rock n ' roll to the latest new - wave stuff .  
 Person2:To tell you the truth , I'm strictly into classical music . You don't happen to have any Bach or Mozart , do you ?  
 Person1:        Sorry , my taste in music doesn't go back any further than the 1960 ' s . Music written before then is just history to me .  
 Person2:Well , speaking of history , let's get back to the books.We ' Ve got an exam tomorrow , remember ? 

formal