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:       I really hate to say this , but don't go away mad , just go away .  
 Person2:I knew this would happen some day .  
 Person1:        Then , why didn't you try to prevent it in the beginning ?  
 Person2:Well . It's not all my fault , Anna . You are responsible , too .  
 Person1:        I don't want to argue anymore . Please get out of my life !  
 Person2:I think we can still talk .  
 Person1:        No way ! Please don't follow me around .  
 Person2:Talk it easy , Anna . You really don't hate me . do you ?  
 Person1:        Yes , I do . Leave me alone ! 

informal