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:       You know John ?  
 Person2:Which John ? Mr.Turnbow ’ s son ?  
 Person1:        Yes . I ’ Ve read news about him in today ’ s paper .  
 Person2:And he ’ s bright and intelligent . I ’ m sure he can pass the university entrance exam .  
 Person1:        I wish he could too .  
 Person2:How ’ s your boy , Jack ?  
 Person1:        He ’ s a bit tired , you know . It often takes him a couple of hours to brush up .  
 Person2:Poor boys ! They work harder at school nowadays , don ’ t they ?  
 Person1:        Good luck to them . 

informal