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 , Fanny .  
 Person2:Hi , Andy .  
 Person1:        Are you feeling OK ? You sound a little tired this morning .  
 Person2:I did not sleep much last night . I really feel bad . It was a crazy night .  
 Person1:        What happened ?  
 Person2:I had a bad dream . I was walking alone in the graveyard , and suddenly all the ghosts jumped out of their graves . They began to chase me through the graveyard and shouted that they wanted my blood .  
 Person1:        Oh , what a nightmare ! Then what happened ?  
 Person2:My mother woke me up . She had heard me crying out for help .  
 Person1:        You have got a great mother .  
 Person2:I felt embarrased . After all , I am 18 years old . Mom gave me some chocolate cookies and a glass of milk .  
 Person1:        That sounds good !  
 Person2:Yeah , but i was afraid to fall back asleep . I am worrying about getting into the University of Michigan .  
 Person1:        Me too . But I tell myself that if they don ’ t accept me , another school will . 

formal