Hi Lidia,
While having
keywords in your business name can make a difference with
SEO to a certain degree the industry is at this point so saturated with 'virtual assistant' etc. biz names that it really isn't something worth putting a lot of stock in.
However, the letter your business name starts with has absolutely
nothing to do with search engine placement - it's by no means an alphabetical system (if you'd like to learn more about
SEO in general, do check out our Search Engine Optimization section here on the boards)
I think Kathie's suggestions are right on and of course, choosing a name that you love and are happy to work with, proud to tell people while networking, etc. is so important.
Be sure to post back and let us know what you decide to go with