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:       What's up , officer ?  
 Person2:Are you aware that you ran through that stop sign ?  
 Person1:        There was a stop sign ?  
 Person2:How could you not notice it ?  
 Person1:        If there really was a stop sign , I couldn't see it because of the overgrown bushes .  
 Person2:You know.You ' re right . The bushes are covering the sign .  
 Person1:        If I saw the stop sign , I would've stopped for it .  
 Person2:Now that I think about it , I can see how you missed it .  
 Person1:        Am I getting a ticket for this ?  
 Person2:I'll let you off with a warning .  
 Person1:        Thank you , I really do appreciate that .  
 Person2:Don't worry about it . I need to have something done about those bushes . 

informal