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 movies do you like , Sue ?  
 Person2:I like all kinds of stuff . I admit I love romance .  
 Person1:        Just like my wife . So , what ’ s your favorite movie ?  
 Person2:You mean my favorite movie of all time ? I guess I ’ d have to say “ pretty woman ” .  
 Person1:        Yeah , my wife likes that one , too . Personally , I prefer action movies . 

formal