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'.
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Question: Person1: You said you like classical music very much . Then who is your favorite opera star ?
Person2:There are three of them , the Three Tenors .
Person1: Oh , you mean Pavarotti , Domingo and Carreras . Have you been to their live shows ?
Person2:Yeah , it's really a unique experience . It's a solo concert by Pavarotti . He put on the performance in the Forbidden City in Beijing .
Person1: I've heard of that one . It was also his swan song .
Person2:Besides , speaking of classical music , we should never forget about the New Year's Concert .
Person1: Of course not . People all over the world watch it on TV , or listen to it on the radio .
Person2:Sure . It's undoubtedly one of the biggest classical music events . Have you ever been to the live show ?
Person1: Yes , I went to the New Year's Concert in 2005 .
Person2:Wow , you are so lucky . I saw that one on TV . But it must be so different to be there in the concert hall .
Person1: That's for sure . You know , it's really amazing to be in the best concert hall , listening to the performance by the best orchestra . I had the greatest time ever .
Person2:Who was the conductor at that event ?
Person1: Lorin Maazel . He did an amazing job . Moreover , he just celebrated his 75th birthday .
Person2:So cool . I wish I can go to the live New Year's Concert someday in the future .
Person1: The right opportunity for you would come along soon . You know , music is transnational .
Person2:I believe in that . Well , the performance is about to begin . Let's be quiet .

Answer: informal

Question: Person1: It smells like an ashtray in here !
Person2:Hi honey ! What ' s wrong ? Why do you have that look on your face ?
Person1: What ' s wrong ? I thought we agreed that you were gonna quit smoking .
Person2:No ! I said I was going to cut down which is very different . You can ' t just expect me to go cold turkey overnight !
Person1: Look , there are other ways to quit . You can try the nicotine patch , or nicotine chewing gum . We spend a fortune on cigarettes every month and now laws are cracking down and not allowing smoking in any public place . It ' s not like you can just light up like before .
Person2:I know , I know . I am trying but , I don ' t have the willpower to just quit . I can ' t fight with the urge to reach for my pack of smokes in the morning with coffee or after lunch ! Please understand ?
Person1: Fine ! I want a divorce !

Answer: informal

Question: Person1: My eyes water continuously . Why ?
Person2:Perhaps because of the dirty air .
Person1: What is there in the air ?
Person2:Some poisonous gas .
Person1: I can't believe that the air in this city is so dirty .
Person2:Yes . I think I won't come here again next time .
Person1: So do I .
Person2:We waste a vacation .
Person1: Maybe you are right .

Answer:
informal