Writing Feedback / You successfully passed a job interview. You are expected to start on November 15, but you [4]

You successfully passed a job interview. You are expected to start on November 15, but you will not be available on that date.
Task:
Write a letter to your new boss,
explaining your situation,
expressing your concern and suggesting a solution.

Dear Sir or Madam

I am Mahdi Hajirajabi ,the network engineer who passed a job interview in your company for working at penetration test department on 23 October.I am writing this letter to inform you that I will not be able to start my new job as a network security expert this week.

As I agreed in my employment contract, I should be at work 2 weeks after my job interview, in this period I could complete my activities at the current job and move to your company .Unfortunately I caught a cold ,then I had to stay at home under medical cares , so going to the office was impractical for me.

Although it was an unavoidable issue, I sincerely apologize for all the possible inconveniences that may have been occurred because of my absence. However, I attend in your office to initiate my new career in the beginning of the next week .In addition , in this period I can accomplish my tasks at home through Internet.

Please let me know if you need any proof of my disease or I should fill some forms in this regard .It would be my honor and a rewarding experience to be a part of your team.

Yours faithfully
Mahdi Hajirajabi