How do you suggest I correct the mistake I made after my first date?

So I am uming that you dont actually hope to see her soon. I am guessing that you dont see her during the course of your normal day, so I would say not to worry about it. I know that you wont be trying to get in touch with her, and if she happens to call you, you can kindly tell her that while you enjoyed the dinner and conversation, you also feel that she isnt the one for you. Whatever you do, dont lead her on by continuing to make a promise to see her soon. Just tell her, and get on with your life. And be careful and think before you speak in the future. Good Luck :)