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 click here , then up to the top .  
 Person2:Er ... Hum ... Got it .  
 Person1:        Then open that window.Yeah , that one .  
 Person2:Right !  
 Person1:        And that's it . You're done .  
 Person2:I see what you mean . That was pretty easy after all . 

informal