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:       What did you buy at the market ?  
 Person2:I bought some special local products .  
 Person1:        You seem to have bought the whole market !  
 Person2:Yes . I really wanted to do so . I love those handicrafts , especially the paper-cut .  
 Person1:        Paper-cuts are all hand-made . Let me see the paper-cuts you bought . They are all animals .  
 Person2:Aren't animals the main content of Chinese paper-cuts ?  
 Person1:        All right . Animals , especially Chinese zodiac , are the most common theme in paper-cuts . But there are other themes .  
 Person2:Then I will buy some tomorrow .  
 Person1:        Why do you want to buy so much ?  
 Person2:Because I want to send them to my friends .  
 Person1:        I see . 

informal