Dear :

[company] is planning a promotion for [products]. We are interested in your agency and would like to know the terms of your service.

We have seen some of your commercials and were impressed by their originality and powerful visual impact. We believe the style of your commercials will work well with our products.

If you are interested, please contact me so that we can talk about terms and make arrangements for a meeting.

We hope to hear from you as soon as possible.

Sincerely yours,

[name]

[title]