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 dude , you look upset , what's up ?  
 Person2:haven't been sleeping well recently .  
 Person1:        what's the problem ?  
 Person2:every night my roommates watch the Korean soap operas till mid-night . I am not a big fan of Korean shows and I don't know how to tell them to stop without hurting their feelings .  
 Person1:        well , you can simply tell them you want to sleep , or make an arrangement for a time when the room should quiet down .  
 Person2:yeah , I know , but I find these sorts of things hard to say . They won't like it if I tell them to turn off the TV . Now I just hope the show will end soon .  
 Person1:        I understand . I used to live in a dorm with four people . I was great in some aspects . We always went out and and had fun together . But on the other hand , when I wanted some quiet time , and people kept  
 Person2:yeah , I crave my own space . i just so tired of having people around me all time . 

formal