1) Hi, this is Daisy Chan, sorry I'm not available right now so please leave a massage and I will get back to you as soon as I can, thank you!
2) You've reached Daisy's Voice mail! I cannot answer your call right now. Please leave a massage and I will call you back. thank you!
3) Hi, this is Daisy's Voice mail! I'm probably busy right now and cannot take your call, please leave your name and contact number or try back (try again) later! Thanks bye!
* you can mix them up, switch around some words if you like, to suit your personal taste.
Hi, you've reached (your name)'s message bank. Sorry I cannot take your call right now. Please leave a message after the beep and I will return your call as soon as possible. Thanks!