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 any particular hobbies , Tom ? 
 Person2:Oh , yes . I love playing badminton , table tennis and computer games . And playing the games has become my favorite . 
 Person1:        I hear many teenagers will spend hours and hours sitting at computers . And they don't care about their own health at all . How about you ? 
 Person2:I'm no better than them . They say it's mindless to sit in front of a machine all the time , but I think it's stimulating . 
 Person1:        You won't play online games full of violence , will you ? 
 Person2:Once in a while . 
 Person1:        It's no good . And I think spending several hours each day playing computer games is a waste of time . You might as well do something healthy and meaningful . 
 Person2:I hope I can practice self-control again . 

formal