I've been assigned a delivery day! Yea! But, I'm going to be out of town for a few weeks and my delivery day is in that window. I realize Tesla won't hold my car and will sell it to the next lucky person in line, but what about me? Will I get a new reservation number? Will I get moved to the back of the line? I don't see any "official" think I can do online...will it all happen automatically?