How should be the mail format?

How shall I write a mail to get my experience letter and relieving letter?

What should be the content? What shall I write in Subject?

I have written this:

Dear XYZ,

Today 14th October 2011 is my last day with XYZ organization. 

I haven't yet had my experience letter and relieving letter. When can I expect those from you?

Thanks,

Harry

What needs to be added or removed here? Is this good to go with?

Please advise!