Here's a draft you can adapt. Fill in the bracketed parts with your bakery's details:

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**Subject: Re: Gluten-Free Cake Inquiry**

Hi [Customer Name],

Thank you for reaching out, and we'd be happy to make a gluten-free cake for you!

We offer gluten-free versions of [list flavors, e.g., vanilla, chocolate, and lemon], made with [e.g., a rice and almond flour blend]. They can be decorated just like our regular cakes, and we're glad to work with you on a custom design.

**A few details:**
- **Sizes and pricing:** [e.g., 6" serves 8–10 for $XX; 8" serves 12–16 for $XX]
- **Lead time:** Please order at least [X days] in advance.
- **Kitchen note:** [Choose one:]
  - *Our gluten-free cakes are made in a dedicated gluten-free facility, so they're safe for customers with celiac disease.*
  - *Our gluten-free cakes are made without gluten-containing ingredients, but they're prepared in a kitchen that also handles wheat. We take care to prevent cross-contact, but we can't guarantee they're suitable for those with celiac disease or severe gluten sensitivity.*

If you let us know the date you need the cake, the number of guests, your preferred flavor, and any other dietary needs (dairy-free, nut-free, etc.), we'll put together a quote for you.

Looking forward to baking for you!

Warm regards,
[Your Name]
[Bakery Name]
[Phone] | [Website]

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Be accurate about the kitchen note. Customers with celiac disease rely on it to stay safe. If you share the customer's original message or your bakery's details, I can tailor the reply further.