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'm afraid it's bad news for you . You haven't got the position .  
 Person2:Oh , no ! I can't have failed . Are you sure ?  
 Person1:        I'm afraid so . I'm terribly sorry .  
 Person2:It sucks . But Arden told me he's satisfied with my qualifications and experience .  
 Person1:        He's the only one of the several to decide this .  
 Person2:How am I going to face the fellows in our office ? They thought I would be promoted . They must be waiting for my good news .  
 Person1:        I don't think the thing can be that serious . You should face the result . Besides , I don't think the position is the best for you .  
 Person2:But I lost the chance .  
 Person1:        Keep working hard , and then you will get another chance of promotion someday . 

informal