How to make a speech if you can't attend the class reunion?

I am really happy to know that there will be a class reunion. Everyone's health and career are going well. It's a pity that I can't spend it with you on such a rare day because of some inevitable things.

Never mind, there will be such an opportunity in the future. I give you my best wishes. I hope you can remember each other wherever you are, and you will never forget the days when we were together.

Finally, I believe our future will be better. Have a nice day. You'd better polish it yourself and add some real feelings.