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:       I think he won't remember White Day . 
 Person2:Silly , you should make sure he does . 
 Person1:        Uh-huh . How about you ? 
 Person2:He ’ s buying me a handbag , and then dinner at a gorgeous restaurant . 
 Person1:        You got a big return for a small gift . 

formal