Exchange 2010 - Need a script to remove all meetings owned by a specific user

Hi everybody, I don't have experience with exchange scripting nor powershell so I'm looking for some help.

The tast I need is to find and remove all meetings owned by a specific user. For example, when an employee is no longer with the company I need a way to search and remove all their meetings from conference rooms, etc.

Let me know if you need any other info:

* Exchange 2010 SP1

* Windows server 2008

* Find and remove all meetings owned by a specific user on either a specific mailbox or all room type mailboxes