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:       Dou you think I should join a basketball team , Mary ?  
 Person2:Why not . If I were you , I certainly would .  
 Person1:        But I'm afraid it will take too much of my time .  
 Person2:As the saying goes , work value work , play value play . All work and no play make a jucky-dull boy , you know .  
 Person1:        Em , you ’ re right . 

formal