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'.

Example 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 .
Example Output: formal

Example Input: Person1: The Canada Day is on the 1st of July .
Person2:What is its national anthem ?
Person1: The national anthem of Canada is ' O Canada ' .
Person2:Can you sing the song ?
Person1: Yes , I could sing it when I was very young .
Example Output: formal

Example Input: Person1: Tomorrow will be my first day at work , what do you think I should be wearing ?
Person2:Well , if you want to look professional , serious and more conservative , a blue dress , white shirt and not-too-high shoes would be the best choice . But sometimes , very formal clothes will keep you at a distance from your colleagues . It depends on the company ' s dress code .
Person1: Indeed , I found most of the employees dress casually when I went to the interview . Only the manager was in suit and tie and he just came back from a ceremony . It seems that their dress code is not that formal . Probably , I should put on car key and simple shirt .
Person2:Whatever you choose , make sure they are neat and clean .
Example Output:
formal