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:       You want to go to the movies tonight ? 
 Person2:Sure ! What ' s playing ? 
 Person1:        The new Twilight movie ! 
 Person2:Twilight ? As in the vampire movies ? No way , I am watching that , but I don ' t understand why everyone is so excited about these films about vampires . It doesn ' t make sense . 
 Person1:        Of course it does . It ' s like a modern tale of Romeo and Juliet . You can see a couple who are in love but can ' t be together because they are so different . And in the fact that immortality and super human strengthen this really sexy and there you have it ! Plus the cast is hip , young people that make the movie even more enticing . 
 Person2:I don ' t buy into that . I think it ' s just a fad . Pretty soon this will pass and everyone will be into wear-wolves or zombies ! 

formal