okie

Used to indicate acknowledgement or acceptance.

“I promise to give it back. – OK.”

Used to introduce a sentence in order to draw attention to the importance of what is being said.

“OK, I'm thinking of a number…”

Used in turn-taking, serving as a request to the speaker to grant the turn to the interrupter.

“You always do this to me! When we were at your mother’s, you said that… – OK, OK, …”