My sister gave me a birthday, thank you. How should I reply to her?

My sister gave me a birthday thank-you letter. You can give it back to her like this.

1: Dear sister, thank you for my birthday. Thank you very much for your concern and blessing.

Your existence makes my life more substantial and happy. I cherish the close relationship between us and hope that we can always support each other and grow together. Thank you again, my dear sister.