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:       how was school today , Dominic ?  
 Person2:I hate school !  
 Person1:        why ? What happened ?  
 Person2:I messed up my mid-term exam so badly today !  
 Person1:        it's just one exam . Can you re-take the exam ?  
 Person2:yes , but it's so humiliating ! I don't want my friends to know I failed !  
 Person1:        why didn't you do a good job ?  
 Person2:I don't know . I sat down in my seat , looked at my paper , and then my mind just went totally blank .  
 Person1:        do you think you studied enough for the exam ?  
 Person2:no ...  
 Person1:        what did you do last night ?  
 Person2:I watched TV .  
 Person1:        did you study at all last night for your exam ?  
 Person2:no , not really .  
 Person1:        I am sure if you had studied , you would have done well . When can you re-take your exam ?  
 Person2:tomorrow .  
 Person1:        alright . Get out your books and I'll help you prepare . 

informal