娘のピアノ教室の発表会が同じ先生に習っているお子さん宅で開かれることになりました。会場を提供してくださった方によろしくとメールしたい。

Dear Mrs. XXX,

Thank you for informing us that the children's piano recital will be held at your home. My daughter, Mai and I will be attending.

I was just wondering if there was anything I can do  to help out for the big day.  I would appreciate it if you could let me know how I can help, such as preparing snacks, drinks, and etc.

Looking forward to hearing from you.

Best regards,
[your name]