Just talk like you normally would.
For example: “Estimate for John Anderson, 24 Main Street, Orlando, FL. Replace a 50-gallon water heater. $1,350 materials, $500 labor. Apply 6% sales tax to materials. Start the job on August 20. I want 30% upfront and the balance when the job is finished on August 24. Pass eligible card fees to the customer.”
or type instead