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: What do you plan to do on Sunday morning ?
Person2:Nothing special .
Person1: How about going to English corner with me ?
Person2:Oh , I'd rather not .
Person1: Why not ?
Person2:You know , I am poor at English , especially spoken English .
Person1: That's why you should go there , If you don't dare to speak English owing to the fact that you are afraid of making mistakes , you simply will never learn English .

Answer: formal

Question: Person1: I can't believe it , I had faith in Bob and he let me down .
Person2:I know what you mean .
Person1: Really ?
Person2:Yes , he did the same to me .

Answer: informal

Question: Person1: Peter really is a remarkable expert ! There is very little he doesn ' t know .
Person2:I have exactly the same feeling . This afternoon he explained the ins and outs of the stock market to me . He knows a lot about investments .

Answer:
informal