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:       Hey , Tom . You look tired . Are you all right ?  
 Person2:I didn't sleep much last night .  
 Person1:        How come ?  
 Person2:You know Miao Li-my roommate , he bought a computer last month . He has turned his computer into an electronic playground . He plays football , rides horses , drives racing cars , and does a whole bunch of other games . Every night he keeps me up .  
 Person1:        Don't you like games  
 Person2:I usually get a lot of information on the computer and use E-mail to send messages to my friends .  
 Person1:        Me too . Recently , I've made many friends on the net . Every day I talk to them and share many interesting things with them .  
 Person2:Don't you think it's a sheer waste of both time and money ?  
 Person1:        I'm afraid not . To me getting in touch with each other has more fun than the coolest computer games or the hottest information .  
 Person2:Yes . 

formal