MeetME - How to invite local user

Hello,
Sorry for my English but I have one quastion. Can You help me.

It’s possible to create extensions who invite eg. 3 sip user to conference?
If I have:

meetme.conf
conf => 8000

and 3 sip user.
SIP/person1
SIP/person2
SIP/person3

How I can create extensions rules to call person1/person2/person3 with one nubmer eg 101 and when they answer they go direct to 8000 conference room?