Dear Restaurant Manager,
I am planning to dine at your restaurant and would like to inform you that I have a medically diagnosed gluten allergy (celiac disease/gluten intolerance).
To ensure my safety, I kindly ask that you confirm which menu items are gluten-free and if special precautions can be taken during food preparation to avoid cross-contamination with gluten-containing products.
Thank you very much for your understanding and assistance in accommodating my dietary needs.
Sincerely,