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:       David , have you watched the 82nd Oscar Awards Ceremony ? Avatar got the Award of Visual Effect . The movie sounds great !  
 Person2:You are so old-fashioned . I have already watched it last week in cinema .  
 Person1:        How was it ?  
 Person2:Its 3D animation is attractive and its colorful scenes are also unforgettable .  
 Person1:        It is said that The Hurt Locker got the Award of Best Picture . What do you think about this ?  
 Person2:Well , its theme is moving and profound , so from the academic aspect , this is its advantage to win the award . 

informal