[Enclosed are the requested signed copies along with a letter]
Thank you very much for the opportunity! I can't tell you how excited I am to have this job. I've signed the requested documents. I hope this doesn't jeapordize this opportunity, but while I can do the training day on the third and work on the fourth, I have prior plans on that Friday, Saturday, and Sunday. After that, however, I am yours for the entire month of holidays, no holds barred and any fill-in time you might need. I hope that will be adequate? You have my intense apologies for any trouble this might cause.