求大神写一篇英语作文

求大神写一篇英语作文
Write a reply to the above letter.Your reply should include the following
1、thanks for the above letter
2、confirmation of your participation
3、request for more information about the program
4、apology for not being able to give another talk (pressure of work - no time for preparation)
5、a complimentary close to end the letter
Some parts of the letter have already been done for you
Dear Mr.Luford
Thanks you for your letter of 24June and I an pleased to____________________________________________________________________________
I would be grateful if______________________________________________________________
Unfortunately,___________________________________________________________________
I am afraid that____________________________________________________________________
However,______________________________________________________________________
Yours sincerely
H.Bool