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: It's taking you forever to do my hair .
Person2:Give me a minute .
Person1: You should've been done already .
Person2:There you go .
Person1: I don't think that you're done .
Person2:What's wrong ?
Person1: My hair looks hideous .
Person2:What's so bad about it ?
Person1: It doesn't look good at all .
Person2:Sorry about that .
Person1: I really hope that you didn't expect me to pay you for this .
Person2:Well , let me talk to my manager , okay ?

Answer: informal

Question: Person1: Who will meet you at the airport ?
Person2:No one .
Person1: Oh , then I will arrange one of my staff to meet you at the airport .

Answer: formal

Question: Person1: Who wants to go first ? Allen ?
Person2:Uh ... I mostly just like to listen . You're the groom . Why don't you go first ?
Person1: OK . Put on something by the Backstreet Boys !
Person2:How about As long as You Love Me ! You can pretend you're singing it to your fiancee Brooke !
Person1: I'd better not . Brooke hates the Backstreet Boys !

Answer:
informal