your wish is my command
US /jʊər wɪʃ ɪz maɪ kəˈmænd/
UK /jʊər wɪʃ ɪz maɪ kəˈmænd/

1.
お望みとあらば, 何なりと
a phrase used to express willingness to fulfill someone's request immediately and without question
:
•
“Could you please get me a glass of water?” “Your wish is my command!”
「コップ一杯の水をいただけますか?」「お望みとあらば!」
•
Just tell me what you need, and your wish is my command.
必要なものを教えてください、お望みとあらば。