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: Do you have any plan on your mind ?
Person2:I want to see all places of renown in Suzhou .
Person1: How are we going there , by bike or by bus ?
Person2:By bike , of course.You don't want to miss the beautiful scenery , do you ?
formal