Dear Mrs Clarke,
I am enormously grateful to you for giving us so much time last week to help with the flowers for Speech Day.
Time and again, both on Friday evening at the concert and during Saturday, guests and parents commented to me on the impact of the flowers.
Thank you for giving us your time and your skill.
Jane will be contacting you early in the new academic year to invite you to lunch with her in order to express our personal thanks to you for all your hard work.
With best wishes,
The Headmaster
Worksop College