英文拒绝邀请函如何写？

Dear Mr. Johnson,
We are terribly sorry that the repair of your cassette player is really beyond our reach. There are several reasons why we left your equipment unrepaired.
Firstly, our technician in charge of the cassette player had been several days off for serious flu, the delayed the handling of the equipment
Secondly, there is no parts found in the present market to replace the volume control which really needs repairing.
We have the ability to replace the onoff switch, however, the cost is too high to worth it, because you can use the amount of money to buy a new one.
Accoring to our survey, this type of equipment is manufactured in 985 and the manufacturer has gone out of business, so it is impossible for you to talk with them.
We are really sorry for our helplessness
Sincerely,
Mason
Manager
july 29, 2005
xxx, ceo
xxx, vp sales
xxxxxxxx corporation
(addre)
it’s our great honor to invite you to visit xxx company located at (addre) in august, 2003.this visit will provide an opportunity for you to make a better understanding of our marketing iues, and to communicate our future busine cooperation in detail.
xxx company, as one of your distributors in china, has been great progreing in promoting and selling your products.we believe this visit will be of great benefit to our future busine cooperation.
please use this invitation letter to apply for your visa to china.
we are all looking forward to seeing you soon, and should you have any questions, please feel free to inform me.
yours truly,
xxx
【英文拒绝邀请函如何写？】vice president sales
xxx company

英文拒绝邀请函如何写？

Dear Professor White,
Many thanks for your letter dated 5th August, inviting me to attend and
chair a session of the forthcoming 20xx International Conference on
Parallel Data Processing to be held in Bellaire, Michigan, from October 25 to 28, 20xx.
Much to my regret, I shall not be able to honor the invitation because I
have been suffering from a disease since this summer. I am firmly advised that it would be unwise to undertake any distant and long travel in the near future.
I feel very sad to miss the opportunity of meeting you and many others in the field of Computer Science. I wish the conference a complete success.
Faithfully yours,
Wang Xuan