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:       Mary , it was wrong of you to be so late . Mother ’ s very worried .  
 Person2:I ’ m so sorry I ’ m late . But Henry ’ s car broke down .  
 Person1:        I don ’ t really like Henry . I like my Rose .  
 Person2:I don ’ t like your Rose . And I do love Henry . And I ’ m going to marry him .  
 Person1:        But my Rose is great .  
 Person2:Your Rose is a fool .  
 Person1:        Really , Mary , you ’ re horrible .  
 Person2:Why don ’ t you marry Rose , then ? 

informal