The phrase is thought to have originated in the early 20th century, possibly as a combination of "okay" and "dokey," which was a slang term for "do you agree?"
Here are some examples of how "okey dokey" might be used:
* "Do you want to go to the park?" "Okey dokey!"
* "I need you to pick up some milk on your way home." "Okey dokey, I got it."
* "Are you sure you're ready to go?" "Okey dokey, let's go!"
It's a fun and casual phrase that adds a bit of warmth and humor to everyday conversation.