Marriage leave application letter

Dear Mr. Arnold, I am John Brennan and I work as the Chief Engineer with your team. I take huge happiness in inviting you to my marriage on the 9th of July. I will be sending you the personal invitation in due course of time. The actual reason is a request to you to grant me a leave of absence for a week starting from the 5th of July. Kindly treat my absence as informed leave and oblige. Thanks in advance. Sincerely, John