Je serai absent(e) à partir du 04/12/2012 de retour le 07/12/2012.

Je répondrai à votre message dès mon retour.
I will be out of my office from December 3rd to December 7th. I will be back on December 10th.
Due to travelling, I will only have occasional e-mail contact. I will respond to your message when I return.