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:       It ’ s going to a volleyball match between the economic department and foreign language department this afternoon . Are any of you keen on volleyball ?  
 Person2:Sorry , I ’ m not a volleyball-fun . I ’ d rather play football . How about you , Mr . Wang . ? Are you interested in volleyball ?  
 Person1:        I ’ m afraid not . My favorite is boots-running . I don ’ t care about games . 

formal