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:       I really want to take a nap . I feel very sleepy today .  
 Person2:What ’ s the matter ? Didn ’ t you get enough sleep last night ?  
 Person1:        I fell asleep very late . It was almost two o ’ clock in the morning when I finally fell asleep .  
 Person2:Are you worried about something ? Why couldn ’ t you sleep ?  
 Person1:        You know how it is when you ’ re in a strange country . Everything is new , and you get tired and nervous sometimes . Then you worry about your family , about conditions back home , about your courses , about your money , about everything . I tried to fall asleep but I just had too much on my mind .  
 Person2:Well , take it easy . Things will look better tomorrow . Maybe you should try exercising or a hot bath to help you relax .  
 Person1:        Anything is worth a try . But right now I really just want to find a quiet place to take a nap . 

formal