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:       I usually get a lot of information on the computer and use E-mail to send messages to my friends .  
 Person2:Me too.Recently , I'm fascinated with net-chat . I've made many friends on the net.Every day I talk to them and share many interesting things with them . I really enjoy it .  
 Person1:        Don't you think it ' s a sheer waste of both time and money ?  
 Person2:I'm afraid not . Every coin has two sides . I think using internet has a great deal to do with human interaction . 

formal