Never market your own services by saying “I’ve been trained to…”. It makes you sound like a terrier. It might be a simple mistake, but it could also mean that you still are thinking of your work as merely a job. What will a client be more interested in – someone who makes his success relying entirely on himself – and his continued success depends on that being a consistently wise choice, or someone who sounds like he expects some invisible superior to step in if he makes a mistake? Training is a good thing, but just say “I know how”.