Honestly they probably didnât think much of it so donât worry about it too much! But generally when someone ends a conversation with a pleasantry like âtake care,â itâs good to thank them and return it in kind. You could also say something like âthanks, enjoy your Fridayâ or âhave a great evening/weekendâ (if itâs at the end of the day) etc to demonstrate warmth, care, and reciprocity