G'day from WA.
That's right, I'm an Aussie and I sound like one!
I do a lot of these, and I used to design IVR systems for a living.
So I can certainly help you out.
Check my profile, reviews and portfolio and get back when ready.
If you want a quick demo on your own script, send it to me.
Also, if you prefer female, Sandie does these as well - happy to send a demo/sample.
Cheers
Sid