Definition: 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'.
Input:  Person1:       do you have internet in your room ? 
 Person2:sure , I am a total internet junkie , I can't survive without internet . 
 Person1:        really ? What do you usually do online ? 
 Person2:well , there are a lot of things , like reading news , email , shopping , etc . but mostly I chat online . You could say I'm addicted to online chatting . 
 Person1:        I never chatted online before . What's it like . 
 Person2:well , basically it's similar to face-to-face chat , but you type instead of talk . You should try it at least once . 
 Person1:        really ? Who do you chat with ? 
 Person2:to people all over the world ! I have a lot of net pals . See , the magic of internet is that it connects people from all over the world . You can chat with someone thousands of miles away as if they were 
 Person1:        that's amazing . I will install an online messenger program when I get home . 
 Person2:well , my suggestion for a newbie like you is that don't get lost in the cyberspace . You know internet won't do the filtration for you , so you still need to use your judgement . There are a lot of per 
 Person1:        don't worry . 

informal