A Okee-Dokee
A Okee-Dokee is just another way to say 'okay' but with more words and less actual effort.
'Sure, I’ll be there... a oke-dokee!' Then he never showed up.
'He agreed to the plan... a oke-dokee!' Then he left me with the dog.
'She said she’d come... a oke-dokee!' Then she left me with the dog and the dog’s best friend.