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:       This man looks very handsome.Is he married ?  
 Person2:Sure.He has already married , a father of two boys .  
 Person1:        Oh , I can't believe it.He looks very young .  
 Person2:He took the picture when he was only 21 years old .  
 Person1:        I see . 

informal