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:       hi , Betty.what ' s up ?  
 Person2:nothing special . how about you ? Are you used to the life here in the States ?  
 Person1:        everything has been fine for the past several months .  
 Person2:great !  
 Person1:        well , I wish someone could talk to me about Western table manners  
 Person2:sounds interesting . Where did you get the idea ?  
 Person1:        as you know , table manners in China are quite different from those of Westerners .  
 Person2:absolutely . that's because both of us have distinctive cultural features .  
 Person1:        for example , in China , it's okay to talk while eating . However , you may regard it as rude .  
 Person2:yes . this must be a huge difference .  
 Person1:        can you think of anything else ?  
 Person2:sure . We tend to think that the slower on eats , the more polite one seems .  
 Person1:        I didn't know that before .  
 Person2:and we never sip or slurp the soup loudly . we quietly like little mouthfuls .  
 Person1:        i got it . i'll bear it in mind .  
 Person2:don't worry . i'm sure our etiquette will become a natural part of your behavior as time goes by .  
 Person1:        I hope so . 

informal