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:       Will you look at this form ?  
 Person2:Are you having problems with it ?  
 Person1:        I don't understand some things .  
 Person2:Let me help you .  
 Person1:        What does MI mean ?  
 Person2:MI stands for Middle Initial .  
 Person1:        What does MM / DD / YY mean ?  
 Person2:That means Month / Day / Year . Use numbers .  
 Person1:        I don't understand .  
 Person2:For example , if your birth date is January 12 , 1987 , write 01/12 /8 7 .  
 Person1:        Oh . That's simple enough .  
 Person2:Always print clearly , and fill in the bubbles completely . 

formal