instruction:
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'.
question:
Person1: I think we should accept his plan .
Person2:I'm afraid I can't agree with you .
Person1: Why ?
Person2:Simply because it's not practical at all .
answer:
formal

question:
Person1: Why do you want to be a teacher ?
Person2:It's a job I've been dreaming of since I was very little . I firmly believe that teaching is one of the most honorable jobs in the world .
Person1: In what department do you wish to work if we hire you ?
Person2:I want to work in the English Department , as I am an English major .
answer:
formal

question:
Person1: Let me see . How much should I pay for you ?
Person2:Don ' t think about it !
Person1: No , this will not do . Let me see .
Person2:You pay for the taxi and dinner , then to even things up .
Person1: Good ideas .
answer:
informal