No problem! Even Brunette's have a 'Blonde' moment every now and then Alyssa!
It looks like you can't get the message back but if you click on the 'You have 'X' confirmed and 'Y' unconfirmed private message receipts' underneath the 'jump to folder' drop down box you should be able to see who you emailed. You may be able to backtrack from there and just send them a message saying that you accidentally may have deleted their message...and maybe you can salvage a few appointments.
Jim - it wasn't even so much appointments.. Just a lot of casual banter and safe notes..
Lol.. Ahhh well... Perhaps a memory refresher is in order when I get home.