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:       You know that this afternoon's meeting is cancelled , right ? 
 Person2:Why am I always the last to know these things ? 
 Person1:        I sent out a notice . You've stopped checking your e-mail ? 
 Person2:No , but Bean did send me like a hundred forwards today . My mailbox must have been overflowing . 
 Person1:        How obnoxious ! I heard he was sending you dirty jokes . 
 Person2:He not only sent me nasty e-mail , but he's so bored , he even asked me to search the Net for even more forwards for him ! 

informal