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'.

Example input: Person1: Hey man , you wanna buy some weed ?
Person2:Some what ?
Person 1:Weed ! You know ? Pot , Ganja , Mary Jane some chronic !
Person2: Oh , umm , no thanks .
Person1: I also have blow if you prefer to do a few lines .
Person2: No , I am ok , really .
Person1: Come on man ! I even got dope and acid ! Try some !
Person2: Do you really have all of these drugs ? Where do you get them from ?
Person1: I got my connections ! Just tell me what you want and I ' ll even give you one ounce for free .
Person2: Sounds good ! Let ' s see , I want .
Person1: Yeah ?
Person2:I want you to put your hands behind your head ! You are under arrest !
Example output: informal
Example explanation: Based on the conversation, we can see that there is a presence of exclamation which is not present in a formal discussion. Therefore this is an informal conversation
Q: Person1: Are you a blogger ?
Person2:Sure I am . I've been writing a blog for almost three years .
Person1: Oh , it seems that I'm the only one who never blogs . When did you get started ?
Person2:I began blogging when I first went to the US for my graduate strides .
Person1: What do you usually write about ?
Person2:At first , I'll write about my life there . Like interesting things on the campus , travel stories , special English words that I come across . Sometimes , I'll post my pictures on my blog so my friends and family can get to know how everything's going .
Person1: That's interesting . How often do you write a blog ?
Person2:It's random . If there happen to be a lot of things going on , I may add several new entries in a week , and if I've got nothing to share , I may leave my blog untouched for weeks .
Person1: Got it . Are you still updating your blog ?
Person2:Sure , since I came back from the US , I've been keeping the habit of blogging , simply to share my personal insights on any topic I like .
Person1: Good for you . I know many people just leave their blogs alone after the first few months .
A:
informal