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 about your grades of study ?  
 Person2:I have been doing quite well . As reach 90 % and Bs reach 100 % . And I ’ Ve been awarded Zu Jingle Scholarship two times .  
 Person1:        Besides your major , do you know some in other fields ?  
 Person2:Yes . To develop my knowledge , I studied Economics , Business Administration and Accounting through self-study . Nowadays , I have passed three courses on CPA .  
 Person1:        Have you ever been a student leader ?  
 Person2:Yes , I used to be the monitor of my class .  
 Person1:        Did it affect you much ?  
 Person2:It ’ s a very important experience for me . First , it improved my organizing ability , and let me understand how to resolve a problem in the overall perspective instead of my own perspective . Second , it let me know how to cooperate in harmony with people who I like or dislike . 

formal