Thanks to Havoc1992. I've not seen this screencap posted yet.
In the notebook it says 1 unread message. if you use the arrows to scroll down in the sent folder, Sam replies to Oceanic air. He states:
"I refer to your previous e-mail. I have returned all company property to Oceanic Air.If there is any other reason why my final payment should not be released immediately, please let me know. Yours Truly, Sam Thomas."