asterisk users - Jun 2006 - Anyway to set maximum wait time when there's only 1 user in Meetme?

Hi all,

I am trying to find a way to set the maximum wait time for a user in MeetMe.
I am creating a dynamic conference.
If there's only 1 user in the conference room, I would like to allow him 
to wait only until the certain time. eg. may 1 min.
If there's no other user joining the conference, I'll hang up his call.
Is there any technique to enable this??


Pim