Given the task definition and input, reply with output. 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'.

Person1: Many people say it's a good story.But I think it's boring !
Person2:I don't think I share your view there.The writer is writing about history , society , human nature and so on.It ' s too hard to understand .
informal