Request for change schedule

good day... pls.. help me to correct my letter, request for change schedule.. thank you.. god bless

Dear Sir/Madam:

Good day!

I, Ms. ________ is requesting your good office to have an exchange duty with Ms. ________ on _____date____. I will post her 6 pm- 6 am duty and in exchange, she will post my 6 am - 6 pm duty on ___date____. This is because i need to attend to unexpected matter.

Thank you for your kind consideration and hoping for your positive response.

Respectfully yours,

__Name_______