Oil into Coolant System

It was dark outside and I accidentally pour oil into my coolant reservoir. I didn’t start the car, I took the reservoir out and dump the oil in a water jug, and refilled with coolant and went to work. Of course there was some amount left in the walls of the reservoir so what I want to know is if a flush would be enough to clean all the oil from the system or should i replace a few parts. The vehicle is a 2002 toyota highlighter v6 if it matters