"Just found this treasure—Common Replies: Comebacks for ‘What are your plans for this weekend?’—it's full of witty gems like ‘Training squirrels to do my taxes’ and ‘Running a marathon… on Netflix’. They’re hilarious and perfect for instant laughs. What’s your favorite go-to reply when someone asks about your weekend?"

When someone says “Have a good day,” I sometimes switch it up with “Don’t tell me what to do” (jokingly) or “I’ll try, but only if you do too”.
Found more clever and funny responses here: how to respond to “Have a good day” — way better than just saying “You too.”