Dear :

We would like to express our sincere thanks to [name], your [position], and his assistants.

We were deeply impressed by their meticulous care to our needs, impeccable service, and pleasant manners, which made our anniversary celebration of [date] a most memorable event. Without their invaluable help, this party would never have been such a great success.

Please give our best regards to Mr. and his staff.

Sincerely yours

[name]

[title]