This was suggested by HopeVarmillion as well

Mavis: Hi third Master! or sixth master

Macarov: Hello first master

Mavis: Im glad I dont have to take care of the paperwork!! 

Macarov: ...

Mavis: Who's the most trouble?

Macarov: As a person? Natsu. As a group, Erza, Natsu, Gray.

Mavis: oh, I can see that :P

Macarov: So.much.paperwork.

Mavis: :)