求一份英文E-mail？。。急急急！！

Dear Mr John Smith,

I do apologize for my inability to deliver the product samples personally to you tomorrow. This is because I have to attend a very urgent and important meeting which had been fixed at the eleventh hour. I understand that I had previously promised to deliver the product samples to you personally. However, this last minute arrangement has caught me offguard completely. I do sincerely apologize for the sudden change in schedules.

Since tomorrow is no longer available, could I please suggest an alternative date and time for delivery of the product samples? I will be available the day after tomorrow in the afternoon at 3pm. I shall personally deliver these samples to you as previously agreed upon. Please let me know if this timing fits your schedules. If this is not a suitable timing for you, please let me know your next availability.

Once again, I do sincerely apologize for the change and the inconveniences caused. I await your prompt reply.

Thank you.

Yours faithfully,
Wang Li