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: How may I help you ?
Person2:I want to return this video .
Person1: Is that all you need ?
Person2:I also need to check these books out .
Person1: Anything else ?
Person2:That ' s everything .
Person1: I need your library card .
Person2:I have it . Here you go .
Person1: Do you need anything else ?
Person2:That ' s everything .
Person1: Your books are due back two weeks from today .
Person2:Thank you . Good night .

Answer: formal

Question: Person1: Here ' s a letter for you .
Person2:Let me see it .
Person1: Who ' s the letter from ?
Person2:It ' s a letter from UCLA about my acceptance .
Person1: Read it !
Person2:UCLA accepted me !
Person1: Really ?
Person2:I ' m not joking . I got accepted !
Person1: I ' m so happy for you !
Person2:UCLA was my second choice , but I ' m happy knowing I ' Ve been accepted .
Person1: I am really proud of you .
Person2:You have no idea how proud I am of myself .

Answer: informal

Question: Person1: Professor Wang looks so handsome today . He is wearing a light brown suit and a pink tie .
Person2:He always wears an extremely becoming suit with tie .
Person1: He ' s quite particular about what he wears , especially about his ties . He gets different tie each day .
Person2:A light brown suit and a pink tie today , and a light blue shirt and a blue tie yesterday . A perfect match !
Person1: The tie is necessary for man . It makes you look so attractive in a super tie .
Person2:Match is important ; well , the way of tying is also important .
Person1: My father dose not know how to tie a tie , for he often wears a cravat .
Person2:My father wears a tie every day , but he can ' t do it himself . My mother helps him with his tie every morning .
Person1: You mother is not only a patient mother but also a gentle wife .

Answer:
informal