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:       Do you have any year-end benefits ?  
 Person2:I don ’ t know till now .  
 Person1:        I just saw a piece of news , that a group of white color workers hold a flour war in the office because of dissatisfaction of the year-end benefits .  
 Person2:Why they hold a flour war ?  
 Person1:        They got rice , flour and oil as presents , while the leadership got 1000 yuan shopping card .  
 Person2:They are not feeling satisfied ?  
 Person1:        It is said that the presents they got value less than 200 yuan , and it is no use for them at all , because they don't cook by themselves .  
 Person2:But how guilty to waste food ! 

informal