SAMPLE : Thank you very much for your invitation

To
--------
-------

Dear ---,

Thank you for your thoughtfulness having me remembered me on this event.

Thank you very much for your invitation. I have just arrived last night from my business visit to ------------ and sincerely regret to miss the opportunity of joining you at the ------. I am sure the Show was successful, I look forward to join you in similar event in future.

Best wishes


----------.