How should employees who resign due to illness reply to WeChat?

You should reply like this; Manager XXX, you did your duty in our company and successfully completed the tasks assigned by the company. As a boss, you really want to keep you and continue to shine in your next job. I am waiting for your surprise decision. If you are a colleague, you should reply like this; Hello, manager XXX! I'm glad to hear that you left your job. You finally took a big step in your life. I hope your next career will get better and better. As a colleague, I am proud of you!