Use your own facts and language as the starting point, then edit every draft before it reaches a customer.
Start with your own material
Gather the words you already use when explaining your work to a customer. Include your actual services, typical questions and a few examples of phrases that feel natural to you.
Give the draft a purpose
Ask for help with one section at a time. Explain who is reading it, what they need to understand and what the next step should be. A specific task gives you a clearer draft to evaluate.
Your voice is in the choices you make, not the adjectives you add.
Edit for substance
Read every sentence for meaning. Replace vague promises with information a customer can use. Check names, prices, dates and claims against approved sources before publishing.
Read it out loud
If a sentence sounds like something you would never say, rewrite it. You can be professional without sounding distant. Keep the final version clear, accurate and comfortable to read.