Things don’t always work out. We all get it. No big deal. But if you’re going to flake, at least give the courtesy of an explanation. Most of the time, good excuses can cure ill will. A strong explanation may be the only thing that can win you a second chance. Even dishonest excuses are better than nothing. Any effort to empathize with the inconvenience or disappointment you impose is better than no effort at all.
If you flake all the time, excuses run their course. Nothing can help you then.