I exclusively use Hangouts (and sometimes LINE for my friends and family in Asia), and you can do it with Hangouts, but I don't know about the stock LG messaging app.
If you enable SMS in Hangouts and use that as your main messaging app (which is really just the push of a button), you can achieve what you're looking for quite easily.
Whether it works in LG's stock messaging app or contact app or whathaveyou, I'm not sure, as I always only do it through Hangouts.