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:       Where are you going ?  
 Person2:It ’ s Tuesday today . I always go to my class on Tuesday night .  
 Person1:        I didn ’ t know you were taking any kind of class . Tell me about it .  
 Person2:Well , I ’ m learning how to use math in the business environment .  
 Person1:        What for ?  
 Person2:The job market is so competitive nowadays . I want to develop some useful skills .  
 Person1:        I really admire you for that . How is it going ?  
 Person2:It ’ s going all right . I ’ m learning some things for the first time , but I ’ m also brushing up on some things that I already know . 

informal