I'd say yes, it can help solve it. In my experience meditation can make the gap between what you hear being said and what you choose to reply more visible to you, and perhaps sort of prolong it, so that you with time have a little longer to formulate a response. Just an effect of better mindfulness, I guess.
Are you, by any chance, an introvert? It seems that it's more common for us to have trouble coming up with something good to say in the moment and it can lead to those "why didn't I say *that* when I had the chance?"-type thoughts. Apparently something to do with the pathways in the brain being slightly different compared to extroverts, IIRC.
