如何恰到好处的表达"再见"

Goodbye！Thank you for your attention. (再见！谢谢诸位捧场。”这是演讲人结束演讲时的用语)

VS

Good luck to you! (祝你成功或顺利！是祝愿某人顺利完成某事或一路平安时的告别用语)