How do you use au fait in a sentence?

Here are some examples of how to use "au fait" in a sentence:

* Formal: "The CEO is au fait with the latest market trends and is prepared to adapt our strategy accordingly."

* Informal: "I'm not au fait with the new software, could you give me a quick rundown?"

* Humorous: "My grandmother might be au fait with the latest TikTok dances, but I'm still trying to figure out how to use the remote."

Note: "Au fait" is a French phrase meaning "well-informed" or "up-to-date." It is often used in formal settings and is considered somewhat archaic in everyday conversation.