consider it done.
Your wish is my command.
A: I'm sorry, but I can't go to the movies with you tonight. Because I have so many chores and must run a few errands.
B: That's okay. I understand. What do you need to do?
A: I need to pick something up for dinner on the way home. Then I must prepare the school lunches for my two sisters. Oh, I'm so busy.
B: Maybe I can come over and help out?
A: Really? Could you? I need some dry cleaning picked up.
B: Consider it done. Anything else?
A: Could you hang out the washing?
B: Not a problem.
A: And wash the dishes?
B: Just call me the human dishwasher.
A: Great, maybe I will have time to see a movie tonight.