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've just got the examination results . I am afraid you haven't passed .  
 Person2:Oh , no ! I can't have failed . surely ?  
 Person1:        I am afraid so . I am terribly sorry !  
 Person2:Whatever am i going to tell me parents .  
 Person1:        Don't worry about that , I am sure they will understand . After all , it was a very difficult exam .  
 Person2:What am I to do ?  
 Person1:        You can always take it again . 

informal