Hello,
Thanks for looking into my proposal.
Having won several Slogan Writing Contests, I request you to visit my portfolio to get an idea of my command over the language, attention to details, and sample works.
You will receive a couple of unique slogans from me for your company. And I am sure it would be rather difficult for you to chosse the best one, from the lot.
I look forward to hearing from you.
Cheers !
Roy