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:       How do you like the play ?  
 Person2:It is very dull , and the production isn't very satisfactory , either .  
 Person1:        You're absolutely right . I think the acting could be better .  
 Person2:To be fair , both the costumes and scenery are marvelous .  
 Person1:        Maybe you're right . But I really don't like it .  
 Person2:Well , we'd better go to a musical comedy next time . I think the one we saw last month was very good .  
 Person1:        Yes , they had constant changes of scene , and I love variety .  
 Person2:Me , too . I hate to sit there and look at the same stage scenery one scene after another . 

formal