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:       Are you a happy married man ?  
 Person2:Yes , I am . My wife and I understand each other .  
 Person1:        You are a lucky man . How about Mr . Smith .  
 Person2:I don't know . But they say that Mrs . Smith wears the pants in the house .  
 Person1:        You mean she bosses her husband around ?  
 Person2:That's right . She is pretty , but she wants to control everything in his life . 

formal