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:       Mom , I just finished my paper . Can you proofread it before I hand it in ?  
 Person2:Sure , let ’ s take a look . Sweetie , this is terrific . Your ideas are so original .  
 Person1:        Thanks .  
 Person2:I can tell you worked hard on it .  
 Person1:        I really did ! I started thinking about what I wanted to say three weeks ago .  
 Person2:Well , it was definitely worth all the time .  
 Person1:        Let ’ s just hope my teacher agrees . 

informal