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:       Harry is a hen-pecked husband .  
 Person2:No , he isn ’ t .  
 Person1:        Then why does he let himself be lead by the nose ?  
 Person2:He is afraid of his father-in-law . 

formal