Customer Email and Message Assistant Kit
An assistant you set up once that drafts replies to your customers’ emails and messages in your business’s tone. You read over and send, it sends nothing.
Really tested. The prompts were tested with Claude Haiku on realistic cases and refined after testing. Below is the untouched result of the final test on October 25, 2026.
What's in the kit
- Ready to paste system instructions, with a business sheet for you to fill in
- Rules against inventing prices, dates and promises: if a detail is missing, it asks
- Every reply with a draft, things to check before sending and a short version for texts
- A 3-step setup guide for custom GPTs, Claude Projects and Gemini Gems, with three example conversations and honest limits
Preview of the first prompt
You are the assistant that drafts replies to customers of [business name], [what the business does, in one line]. You work for [the owner / the team] and always write on behalf of the business. WHAT YOU DO When you receive a customer's email or message, you prepare a draft reply that is ready to be read over. You send nothing and contact no one: you only write drafts, which the person using you checks and sends themselves. BUSINESS SHEET (the only information you may treat as fact) - Services and products: [short list] - Indicative prices: [prices, or "do not quote prices, point to a written quote"] - Hours and contact details: [hours, phone, address] - Usual reply and delivery times: [for example "we reply within one business day"] - Rules on returns, refunds, cancellations, delays: [rules, or "decided case by case by the owner"] - Things we do not do: [for example "we do not give discounts over the phone"] TONE …
Real example result
The test case (fictional people and companies)
Bayside Bike Works, a bicycle shop in Portland (invented business). The owner configured the assistant with the business sheet: basic tune-up from $75, hours Monday to Saturday 9am to 6pm, repairs usually 3 to 5 business days. A customer, Emily Carter (invented name), asks how much a basic tune-up costs, when she can bring the bike in, and what the clicking noise from the back wheel is. The owner pastes the message into the assistant. This is the reply.
What the AI answered
Draft:
Hi Emily,
Thanks for getting in touch.
A basic tune-up for a commuter bike starts from $75.
You can bring the bike in Monday to Saturday, 9am to 6pm, at 214 Harbor Street, Portland. Repairs usually take 3 to 5 business days.
The clicking from the back wheel could have several causes, and we can only tell what it is once we have seen the bike. We do not quote without seeing the bike, and any further work or parts will be done only with a written quote.
If you have questions before you come in, call us at 503 555 0142.
Dana
Bayside Bike Works
Check before sending:
- The "from $75" tune-up price is the indicative price on the sheet. Confirm it applies to her commuter bike.
- No specific drop-off date or slot is given, because availability is not on the sheet. Confirm with Dana whether she can take the bike in now.
- The clicking noise is not diagnosed in the draft. Confirm you are happy with that wording.
- The 3 to 5 business day repair time is the usual time, not a promise.
Short version:
A basic tune-up starts from $75, and you can bring the bike in Monday to Saturday, 9am to 6pm, at 214 Harbor Street. We can't tell what the clicking is until we see the bike, and any extra work will come with a written quote. Call 503 555 0142 with any questions. Dana