I'm not sure I catch your drift. Do you mean if someone else already gave the response you were going to? If so, you have a few options. A) Quote them and say something like, "I agree," or if you're cool, "True dat!" B) Repeat the response, only better. Or C) Hang your head in late comer shame and don't respond.
^^^^^true dat
0.1 IJ carpet python
1.1 childrens pythons
0.1 crested
1.0 three toed box turtle
1.0 aussie shepherd
1.0 chupacabra/hyena dog thing.
1.2 strange cats
0.2 stranger children
0.1 even stranger GF