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:       So Chris , I've heard that you're from a big family . How many people ?  
 Person2:Nine total . Seven children and my parents .  
 Person1:        Seven children ? That's a lot . Why did your parents have so many ?  
 Person2:Well , my mother came from a big family , and wanted to have one of her own . My father was an only child , and didn't really care about having a large family , but my mother talked him into it .  
 Person1:        Jeez , seven children . That must have a lot of problems . We have four children in my family and my grandparents can never get our names right .  
 Person2:It can be hard , and there are certain sacrifices you have to make .  
 Person1:        Like what ? I assume that there's no privacy .  
 Person2:That's one . Another is the lack of personal property . Everything you have , from toys to clothes , is used by your brothers and sisters . Especially clothes . Three quarters of my wardrobe are hand-me-downs .  
 Person1:        And the age gap is also annoying . There's a ten-year difference between my younger brother and me . We have nothing in common .  
 Person2:Same problem here . There's an 18 - year gap between the oldest and youngest child in my family . The last child was born just as the oldest was going to college . 

formal