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 don't know how John can put up with his son , who fools around without working .  
 Person2:He's out of John's hands . Nothing he can do about such a black sheep .  
 Person1:        If I were him , I would give him a good talking-to . I would insist on his stopping fooling around like that . 

informal