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:       Who is responsible for the accident ? Is it Tony ’ s fault ?  
 Person2:No . I don ’ t suppose he ’ s to blame . The man in the other car made a big mistake .  
 Person1:        You mean Tony is the victim ? No , I don ’ t think so . He ’ s equally responsible because he tried to overtake you .  
 Person2:Yeah . I think everyone should go easy on driving . 

formal