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:       You're spending a very long time on my hair .  
 Person2:I'm almost done .  
 Person1:        I needed you to be done and finished an hour ago .  
 Person2:I'm all done now .  
 Person1:        Are you sure you're finished ?  
 Person2:I don't understand .  
 Person1:        You did a horrible job on my hair .  
 Person2:What's wrong with it ?  
 Person1:        I don't like anything about it .  
 Person2:I apologize .  
 Person1:        That's fine , but I'm not paying for it .  
 Person2:Excuse me ? Let's try to work this out , okay ? 

informal