Don't know...

[don't know]

Please revise my short text below, anyone?

Dear Richard:

How are you? I am don't know, one of the cafe attendance at Starbuck caf. Please acknowledge my invitation messages attached with this mail message. May I know when you will reply to me? Also, when is your graduation and location of your graduation ceremony hold, please? Thank you.

Have a great day!

don't know

[Tdol]

I am don't know, one of the cafe attendance at Starbuck caf.- I am, if you don't know, one of the attendants at Starbucks.
and location of your graduation ceremony hold,- and where will the raduation ceremony be held

[don't know]

Thank you. I still cannot see my own mistakes.