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:       Listen to this . Mary got married .  
 Person2:Is she really ? I can ’ t believe it !  
 Person1:        Yes . Yesterday .  
 Person2:Good gracious . That ’ s incredible !  
 Person1:        She married Jerrod .  
 Person2:You ’ re kidding .  
 Person1:        She ’ s going to live in Paris .  
 Person2:Really ? I ’ m surprised . 

informal