Discuss any courses you have taken in communication, journalism, or writing. As well, talk about the direct work experience you have in preparing advanced written communications as an MSL. If you have a sample of your written communication in the form of a report or a work-related article, you can certainly bring that example with you to your interviewer. Talk to the interviewer about your written communication abilities and support your answer with a case or story. Some possible words you can use to describe your writing style can include articulate, crisp, formal, and succinct.