Dear Bob,
I'm writing the letter to express my sincere apologies to you.
To begin with,I'd like to take this opportunity to extend my heartfelt appreciation for the kind assistance you rendered me during my stay in Canada.During my stay in Canada,I borrowed a CD of Beethoven's symphonies from you in Canada.Unfortunately,when I returned home,I found to my surprise that the CD was in my personal baggage due to my carelessness.
To solve the problem,I would like to send this CD to you by Express Mail Service.Once again,please accept my sincere apologies for any inconveniences that I have caused.I hope this will settle the matter to your satisfaction.
Yours sincerely,
Li Ming