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:       What kind of films do you like best ?  
 Person2:I like feature films best . How about you ?  
 Person1:        I don't like feature films . I think sometimes it loses contact with reality . I like to see some documentary films . What kind of feature films do you like best ?  
 Person2:I always like to see the oldies , like The Sound of Music , Gone with the Wind . They are realty the best - in the acting , the scene and the plot .  
 Person1:        You are sort of romantic . 

formal