Dear

Thank you for affording me the opportunity to meet with
you and members of your staff.

I know that     [ex-salesman]     serviced your account
for many years and made many friends at your firm.  While
his presence will be missed, I can promise that you will
continue to receive the fine service that has always been
afforded by     [firm]

The hospitality you showed me yesterday explains why
[ex-salesman]   held your organization is such high regard.