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:       Hey Claire , you've been really quiet these last few days . Is something wrong ?  
 Person2:I've been really stressed . It's the end of the year and I've got so much stuff to do ! I feel like I'm drowning in work .  
 Person1:        Well , stress is a real thing . It's not an imaginary condition .  
 Person2:It's seriously affecting my life ! I can't sleep , I don't have much of an appetite and my husband says I've been kind of short tempered . Other people seem to handle stress okay ... why am I so weak ?  
 Person1:        You're not weak ... you're stressed out ! Stress has been a part of the human condition for millions of years . Back when we still lived in the trees we had to watch out for predators ... and as you might imagine , that was pretty stressful .  
 Person2:Yeah , but I don't see any tigers or leopards roaming around our office . My stress is just about silly paperwork !  
 Person1:        But you're actually having the same reaction as our tree-dwelling ancestors ! It's called the flight or fight response . Each time you feel like something's threatening you , your body decides whether to run away or fight ... it causes all sorts of chemical reactions in the body .  
 Person2:So a deadline will cause that same reaction ?  
 Person1:        It could . Modern humans actually have more flight or fight responses than our ancestors did . They just had a couple of close calls every day , but today , we have dozens or even hundreds !  
 Person2:So the life of a cave woman was less stressful than my life ? 

formal