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:       I ’ m forming a music band .  
 Person2:Do you already know how to play an instrument ?  
 Person1:        Uh ... Yeah ! I ’ Ve told you a thousand times that I ’ m learning to play the drums . Now that I know how to play well , I would like to form a rock band .  
 Person2:Aside from yourself , who are the other members of the band ?  
 Person1:        We have a guy who plays guitar , and another who plays bass.Although we still haven ’ t found anyone to be our singer . You told me that you had some musical talent , right ?  
 Person2:Yes , I ’ m a singer .  
 Person1:        Perfect . So you can audition this weekend here at my house .  
 Person2:Great ! Wait here ? You don ’ t have enough room for the amplifiers , microphones or even your drums ! By the way where do you keep them or practice ? 

informal