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:       The acting of this film is marvelous.In spite of the thin plot , the acting , the music and the scene have won the Academy Award of this year .  
 Person2:I'm sorry for hero . I dont think there's any excuse for his acting in some parts .  
 Person1:        Don't be too critical.We can't expect it to be perfect . 

informal