Dear :

Please thank everyone at your Department of Public Relations for the hospitality they extended to our engineers and administrators last week.

During our visit to your company, we were all impressed by the improvements you have made in the design of [products] and the expertise and enthusiasm of your engineers. Our engineers especially praised your main speaker, [name], who demonstrated and explained the principles behind the design of the new system. The visit was indeed very rewarding. We all look forward to a long and cooperative relationship.

Yours sincerely,

[name]

[title]