Ahhh the dunes. I'm sure a scenario like this has happened to you guys at least a couple of times:

Me>>Ok I'll be in the dunes in a few minutes.

*arrives in 5 minutes*

Party>> Cool PT is full, lets start.

*Kills 2 mobs, the tank LVs up*

Tank>> sorry guys, I gtg *leaves pt*

*waits 20 minutes for replacement*

Party>> got new tank

*waits 20 minutes for tank to arrive*

Tank>> ok I'm here
Main healer>> sorry guys I gtg *leaves*

*waits 20 minutes for replacement*

Party>> ok we got a healer

*waits 20 minutes for healer to arrive*

Main healer>> Ok guys I'm here

*kills 2 mobs*

Main healer>> I gtg *leaves pt*

*lather rinse and repeat*