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: Hey ! What's up ?
Person2:Hi , John ! I haven't seen you for ages .
Person1: Yeah , I've been out of town .
Person2:So how have you been ?
Person1: Great ! Work is really busy now , but it's fun .
informal

Person1: It ' s dangerous . I don ' t dare to go .
Person2:Come on . It ' s quite safe . You really have no guts .
informal

Person1: Hello . May I help you ?
Person2:Hi . Last month , our company , Turner Interiors of Beijing , ordered some documents under our new L / C . What I want to do is check and see if the documents have arrived yet .
Person1: Let me find that on my screen ... yes , the L / C is right here . I'm sorry ; the documents don't seem to be here yet .
Person2:Oh , dear . When do you think they will arrive ?
Person1: It should be around 5 working days , but different cases take different times . Sorry I can't be more precise .
formal