請幫我檢查這封信有無問題

這封信:

Dear Ms.xxx,

I would like to inform you that the LADIN BILL we have sent them off to the client, the FedEx Tracking Number is 123 456 789 for your reference .

If you have any questions, please feel free to contact me.

regards

xxx Ltd.,

是沒有問題的!肯定!

大致上沒問題, 但有輕微的 Chinglish. 如不介意, 我會改成:
Dear Ms xxx,
Please be informed that the LADIN BILL of FedEx Tracking number is 123 456 789, kindly keep it as reference.
Please feel free to contact me if you have any questions about it.
Rgds
xxxLtd.

Please see whether the below is better?

Dear Ms.xxx,

I would like to inform you that the LADIN BILL was sent to the client by FedEx. The tracking number is 123 456 789 for your reference. It's our pleasure to be informed when the parcel arrived.

If you have any questions, please feel free to contact me.

regards

xxx Ltd.