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:       Come back . You haven't paid yet .  
 Person2:May , just let him go .  
 Person1:        But he took some newspaper away without paying .  
 Person2:I know .  
 Person1:        Why ? You make me confused .  
 Person2:He lives nearby and he would just glance at the newspaper headlines , read the political sections and return them later .  
 Person1:        Why does he have such a privilege ?  
 Person2:He used to be a hero during the war time and everyone respect him .  
 Person1:        I see . Does he live by himself ?  
 Person2:Yes , he has no children and his wife passed away when he was in the battle .  
 Person1:        He must be lonely ?  
 Person2:I bet . But he is always busy telling the children stories .  
 Person1:        How respectable ! 

informal