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:       Jack and Mary broke up .  
 Person2:it ’ s so sad . They had been together for only two months . Do you know what the matter was ?  
 Person1:        Mary said Jack was cheating on her . Jack was seeing a girl from his hometown . One day , Mary saw them holding hands and ended the relationship immediately .  
 Person2:really ? I ’ m very surprised . He doesn ’ t look like a guy who ’ d ever do that sort of thing , right ?  
 Person1:        no , he doesn ’ t . Anyway , she found out that he had been two-timing her for a long time .  
 Person2:maybe it is for the best . They are not suitable for each other because they have nothing in common and are completely different people .  
 Person1:        how so ?  
 Person2:he is an extrovert while she is an introvert . He likes parties while she hates them .  
 Person1:        poor Mary ! She really liked him .  
 Person2:anyway , she was right to end things and she deserves better .  
 Person1:        do you think they ’ ll get back together ?  
 Person2:no , I don ’ t think so . I know Mary . Once she makes a decision , she won ’ t change her mind .  
 Person1:        I hope she ’ ll recover soon .  
 Person2:so do I . 

informal