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:       I'm really fed up with Larry ! He's the biggest airhead I've ever met.He always makes careless mistakes , and he's a pain to work with . 
 Person2:You shouldn't be so negative.You ' ll always have some co-workers that are harder to work with than others.But if you are negative and start name-calling in the office , it will make a bad working environment for everybody . 
 Person1:        You only say that because you don't have to work with him.The people in your department seem so capable and nice to be around.Take Mary for example.She ' s smart and enthusiastic . I've never met anyone as cheery as she is . 
 Person2:Everybody has their strengths and weaknesses.Even Larry.He might be a pain to be around , but he's also very good at staying in budget on projects.Mary , on the other hand , spends our project money like there's no tomorrow.Also , she's never willing to stay a little later at the office.She always leaves at 5pm sharp . 
 Person1:        Isn't there anyone in the office that is a perfect co-worker ? What about Bob ? Everybody loves Bob.Even though he's flesh out of college and still a bit green , he is a great co-worker . 
 Person2:You're right.He ' s a hard worker , easy to get along with , honest , and he never steals the credit on projects.The only thing he's lacking in is experience . 
 Person1:        Maybe that's why he's so nice ! 

informal