@Teresa, Maybe I'm being too technical but an elevator "speech" is not a slogan that consists of ~ 15 words. Denise was correct in her response to what I would call a slogan.
If you want a brief drive by statement, create a mission statement and memorize it. Define what "quality work" is, that statement is too general to mean anything unique to a listener or audiance from what your competitors tell them, so your blending in not standing out. How do you make their dreams come true? By doing this maybe "We make your dreams come true by creating your minds photo into a lifesize product". That is what a mission statement should do. It is 3-4 sentences but tells a short story.
I'd love to mentor this opportunitry if you post a request, I like this kind of work.
So for those visiting for the answer to the posted question I will post an answer. Truly an elevator speech is about one minute long generally constructed with the first 15 seconds stating what is your name and the business name with what we might call a branding statement, the second 15 describing the market or void in the market we are here as a business to address, the third 15 how is my business is unique from competition in doing what we do, what's your niche', finally sum up the business again, the business name, we can help you in this by doing this, and give a business card.