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:       Mark . Where have you been ? I ’ Ve been calling you all morning .  
 Person2:I ’ Ve been playing computer games .  
 Person1:        What ? So you blew me off yesterday and today over a stupid video game ? What game is so important that you have no time for me anymore ? What are you playing ?  
 Person2:It ’ s called Counter Strike . It ’ s a first person shooter game . It ’ s awesome . It ’ s a multi player game where you can go online and compete against players from all over the world .  
 Person1:        You ’ Ve been wasting your time on this ? I can ’ t believe it ! It doesn ’ t even look fun or challenging !  
 Person2:My laptop is on my bed . If you think it ’ s so easy then get on line and try to beat me .  
 Person1:        Fine !  
 Person2:Damp it ! How are you killing me with a single shot ? It ’ s not fair ! I don ’ t want to play anymore ! Let ’ s go get something to eat .  
 Person1:        Can you bring me something ? I am totally hooked on this game ! 

informal