[after some nervousness and deciding whether or not to send a formal letter back, he opts for a voicemail. hawk sounds nothing but genuine, gracious and grateful, like he can't really believe he earned one in the first place. he's just a tennis guy, for christ's sake.]

Mr. Moore - I'm truly honored for the invite. Thank you for your consideration.

I'll happily accept, and if it isn't too forward - maybe I'll have the pleasure of shaking your hand. You and the President have done great things for the country together.

Looking forward to the 14th. Thank you again.