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:       Honey , why are you so angry ? Can you tell me ? 
 Person2:You don ’ t love me , Roy . 
 Person1:        Why do you say such words ? I love you very much . 
 Person2:No , you used to be . But not now . You are in love with someone else . You are in love with my friend , Janet . You appreciate her very much . You think she is beautiful and fun to be with and you think I ’ m dumb and uninteresting . 
 Person1:        Susan , just one last week I went out to have a lunch with her . There is nothing for you to be jealous about . I like your company much better than Janet ’ s . 
 Person2:I envy her and also I hate her at the same time . 
 Person1:        Honey , you should know that I love you so deeply . 
 Person2:Oh , shut up , Roy . 
 Person1:        But honey , I think you ’ re terrific . There is nothing ... 
 Person2:Oh , SHUT UP ! 

informal