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:       Everyone wants to be financial lose kill . You must invest your savings if you planed to retire rich . I ’ m thinking about buying stocks . It can be a good investment if I can manage well . What do you say ?  
 Person2:I partly agree with you . Buying stocks is not difficult , but making money consistently from buying stock is very difficult . Even professionals don ’ t find it easy , so be careful . Anyway , people like us need help with investing . Why not do some online research ? There are data , reports and discussion forums to educate people on how to invest . In addition , you need to visit an established website that offers stock charts .  
 Person1:        Wow , you sound very professional .  
 Person2:I just watched the investment TV program last weekend . It has become a very hot topic these days . Actually I am not even a beginner . 

informal