Exit conference and continue dialplan?

[Bork]

I'm currently using a asterisk conference working something like this:
1. Get room number via dtmf
2. Start conference (room number)
3. When user presses #, go to 1.

So you basically have an IVR that says "please enter room number", you enter the number, if you want to change rooms you don't have to call again and can just hit # instead.

I can't find a similar function in the freeswitch conference app. Is there no way to exit the conference without hangup?

Any other suggestions how to achieve this?

Thank you in advance!