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:       These days my son has turned his computer into an electronic playground . He plays football , rides horses , drives racing cars , and does a whole bunch of other things on the computer . The funny thing about it is that , no matter what he plays , he always wins first place . I wonder if he'll be able to cope with a defeat in real life . 
 Person2:Don't worry . He'll cross that bridge when he comes to it . My son reads a lot on his computer and uses e-mail to send messages to his friends almost every day . He's really absorbed by the discussions . 
 Person1:        That's exactly like my wife . She spends at least two hours a day on the computers discussing things ranging from stock prices to soft-ware standards . 
 Person2:I guess using a computer has a great deal to do with human interaction . Getting in touch with each other must be more fun to your wife and my son than the coolest computer games or the hottest information . 

informal