Dear sir/madam，
On , we will host an evening of celebration in honor of the retirement of , President of . You are cordially invited to att the celebration at , , on to p.m.
has been the President of since . During this period, expanded its business to . Now it’s our opportunity to thank him for his years of exemplary leadership and wish him well for a happy retirement. Please join us to say Good bye .
Yours sincerely,