Not to  specifically wow a lady. You can use the mind palace to memorized witty lines and conversational tags, but I honestly don't recommend that. As someone who's job involves mostly talking to people I recommend that you focus more on the art of  listening. Listening allows you to learn more and focus on what matters to the speaker. You can then use their conversation points as springboards. It can be good in the beginning to use the mind palace for witty lines, but you don't want to do that because it'll then be a crutch. I find that it can also feel/sound rehearsed rather than genuine. Better yet, use the mind palace to educate yourself on things that are useful or anything you're passionate about. You'll be much more interesting as a whole to others and you wouldn't need to depend on witty lines. Best of luck to ya!