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:       Honey , could you help me operate the VD player ? It can't play .  
 Person2:Oh , are the connections correct ?  
 Person1:        I think so .  
 Person2:Let me see . Look ! You confused the video frequency with the audio frequency .  
 Person1:        I'm too careless .  
 Person2:Can it work now ?  
 Person1:        No .  
 Person2:So what's the problem ? Maybe there is something wrong with the disk .  
 Person1:        It's a new disk .  
 Person2:Give it to me .  
 Person1:        Here you are .  
 Person2:Uh , the movie of Tom Hanks . I know why it can't play . This is a DVD disk . 

formal