Provide a clear example of a similar job you have done in the past.
Here's a section of the completed email assignment to whet your appetite:
Our Mission: Provide reliable quality services at extremely competitive pricing
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Your Mission: Provide superior patient care at a fair cost
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Winning Formula!
(Text in email will be centered and bolded appropriately.)
Proposal:
Already completed email-- and it's good! I am new to freelance writing, so I don't have examples to provide, but I do have years of business and writing experience and I'm very confident that I can deliver the type of email that you are looking for. One that will help move potential customers to paying clients. I encourage you to take a chance on me. You won't be disappointed.