急求翻译，软件翻的免进~

I have contacted with the car rent company, since the license plate number will be changed, so the new license plate number will be arrived at you on dec.15, thank you for your understanding.

我已和汽车租赁公司联系过，由于平时每辆车的车牌号会有变动，所以估计要等9月15日左右才能给到你车牌号，请谅解。
I have already contacted the car letting company, since the number plate for each might have some occasional changes, you will have to wait until Sep 15th to get your number plate, we appreciate your understanding.

I have contacted with the car rent company, and the license plate number will be probably got for you on the 15 of Dec., since the license plate number will be changed regularly. thank you for your understanding.

I have contacted with the car rental company, and for the reason of alteration to the plate for each car, you may wait until about Sep.15 to get your car plate.