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 see that there are Olympic mascots in your car . 
 Person2:Yes . I am very interested in the Olympic Games , and I'm especially excited about 2008 Beijing Olympics . 
 Person1:        Me , too . I want to be a volunteer for 2008 Beijing Olympics . 
 Person2:That's cool . Care for a little quiz on that ? 
 Person1:        No problem . I'm an ' Olympic expert ' . 
 Person2:Wow , you've talked the talk . Now it's time to walk the walk . Here we go . First , can you tell me something about the ancient Olympics ? 
 Person1:        The ancient Olympics originated in ancient Greece . 
 Person2:Good . Why do people name it Olympics ? 
 Person1:        They name it after the place where it was first held . 
 Person2:Who started the modern Olympics ? 
 Person1:        This question is a piece of cake . A Frenchman named Baron de Coubertin . 
 Person2:What did people call him ? 
 Person1:        Of course he was called ' the father of the Olympics ' . 
 Person2:What did he do for restoring the Olympics ? 
 Person1:        He once made a speech on the ‘ Renaissance of the Olympics ' . 
 Person2:Well , that's for all . Excellent ! 
 Person1:        I've told you I'm an expert . 

informal