Help with setting up new IVR with option to leave message if unavailable

Hey guys,

I'm trying to set up my new RingCentral phone system that will be receiving calls on the IP phone.

I had a company greeting made, which is your standard "thanks for calling. For retail sales/nutrition questions, press 1. For wholesale accounts, press 2." I also had a greeting made for customers to hear if there's no answer after pressing 1 and another for pressing 2.

I have the IVR menu set up where it directs callers to the correct extension, but if nobody answers, it keeps repeating and does not leave an option to leave a voicemail. How do I add the option for customers to leave a message if their call is not picked up?

P.S. both extensions will lead to the same receptionist, but we wanted to have two distinct options as our business is somewhat multifaceted.

What I want:

Customer Calls > Company Greeting (press 1 or 2)

1 > Receptionist answers; or if not, play my prompt then beep to leave a message

2 > Receptionist answers; or if not, play other prompt then beep to leave a message

I'm having a heck of a time figuring out how to make it do this, so any help would be very much appreciated.

Thank you!