Good one, Roadster!
If you don't want to quote the whole thing, there is another way.
As many do, copy the section you want to use as a quote, click the little quote icon (looks like a speech bubble at the top of the box you type your reply into and copy the quote between the two sets of square brackets.
Then, after the [quote but before the closing square bracket ] type =name-of-the-nob-your-quoting. An equals sign followed by the person's name. PPRuNe will do the rest.
Hmmm, I couldn't have made that more confusing if I'd tried.
Make it look like this, but use square brackets instead of round ones...
(Quote=user-name)text you want to share(/quote)
It's the "=username" that does the trick.