It can read commands from chat to up/hangup the call.
You can download it from here http://developer.skype.com/ (cost $5)
This code tested on sdp-distro-desktop-skypekit_4.5.0.105_2859374 but it work with 3.7 and later.
Put the skypebot.py into {skypekit_dir}/examples/python/tutorial/
Don't create conference from username that you will use for bot!
Better way is to add bot into existing conference.
Check this by typing /get creator
in conference chat.
If creator == bot_skypename you will have error.
Type /get name
to get conference ID and put this string into skypebot line 37.
It must look like: conferenceID = '#username1/$username2;c7cddac89532bab3'