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:       This is going to surprise you , but I'm happy . I think you're making the right move . 
 Person2:You do ? 
 Person1:        Look , maybe I shouldn't tell you this , but I'v going over to WebTracker , too . 
 Person2:No way ! That's great ! Then we'll still be together ! 
 Person1:        Actually , I'm already working for WebTracker . Vince never wanted to give me what I was worth , so I figured , what the heck . 
 Person2:No kidding ! I can't believe this . You devil ! 
 Person1:        It's kind of cool , isn't it ? I'm sort of like a secret agent . 

informal