Good evening gentlemen,
I am writing to you at this time to please ask you all to call me at (857) 544-3630 or e-mail me at email@example.com concerning the Christmas party on Sunday. Unfortunately the U.S. Postal Service is behind schedule with the Christmas rush, so we are not getting information into the office fast enough. We need a list of people for Sunday so just please call or e-mail me to confirm that you are coming on Sunday.
Thank you, love you all!