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: Hi , Bob , this is Mary .
Person2:Hello , Mary , where do you work ?
Person1: I work for an Internet company .
Person2:Is the pay good ?

Answer: formal

Question: Person1: I really hate to say this , but don't go away mad , just go away .
Person2:I knew this would happen some day .
Person1: Then , why didn't you try to prevent it in the beginning ?
Person2:Well . It's not all my fault , Anna . You are responsible , too .
Person1: I don't want to argue anymore . Please get out of my life !
Person2:I think we can still talk .
Person1: No way ! Please don't follow me around .
Person2:Talk it easy , Anna . You really don't hate me . do you ?
Person1: Yes , I do . Leave me alone !

Answer: informal

Question: Person1: Anna , Would you like to dance ?
Person2:I ' d love to , but I ' m a terrible dancer . I ' m afraid I may step on your toes .
Person1: Don ' t worry about it . I ' ll show you how . It ' s a piece of cake .
Person2:Thank you . I ' ll try my best .

Answer:
informal