Lynn, I’m Coming!
Dear  [Lynn],
Okay. Will start the reservation-making process tomorrow. I’ll need to get clearance from the manager for the vacation. Once done, then I will make the reservations.
On the tickets we decided not to use last December: Forget it. Shall we make a pact never to mention it again? 
I certainly do not mind sharing the nights with you.
On subject lines: You know for the longest time, I thought you did not know how to make a subject line in an email message because so many of your message had blank ones. But I guess I was mistaken. But you do understand why I thought the way I did about this. Right? *yikes!*
‘Night.
Tom