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:       Did I do well on my test ?  
 Person2:Do you want to know the honest answer ?  
 Person1:        Why wouldn't I want to know ?  
 Person2:You had pretty bad scores .  
 Person1:        Exactly what do you mean by bad ?  
 Person2:You failed .  
 Person1:        How'd I fail it ?  
 Person2:There are a couple of reasons why you didn't pass .  
 Person1:        What did I do wrong ?  
 Person2:To sum it all up , you really just don't know how to drive .  
 Person1:        Thanks.Will I be able to take a retest ?  
 Person2:Sure you can , in about two and a half weeks . 

formal