I use the paid version of ChatGPT. I have created my own custom CSR where I uploaded my business details. Name, address, etc. and the different staffing roles. I uploaded my policy and procedure manual, my safety manual, and a plethora of SOP's. I told it how I do my billing based on location for travel costs etc.
I also gave it a personality that is friendly and understanding, but firm and fair. I use it to quote jobs, generate replies to emails, write up liability waivers and contracts. Make offers to purchase etc.
Basically, anything that you would want to run by the hive mind.