dear sir/madam:

　　on , we will host an evening of celebration in honor of the retirement of , president of . you are cordially invited to attend the celebration at , , on from to p.m.

　　has been the president of since . during this period, expanded its business from 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 to .

　　see you on .

　　yours sincerely