Panel 1: As she prepares to hustle Warren out the door, Liz says that he could no more give up flying than she could give up being a narcissistic twit with a martyrdom complex.
Panel 2: As he heads off to parts unknown, he says it was great knowing her. She responds by echoing him.
Panel 3: Too bad he spoils the mood by blaspheming against the Sacred Settlepocalypse. Imagine his daring to say that Anthony may not be Mister Right after all. Did he not look on their blandly wholesome love and despair of coming between them?
Panel 4: He compounds his sin by punnily stating he'll be there if she should need someone who might actually leave the Holy City of Milboring. Sure, she smiles politely but secretly wishes he'd end up like the Nazis in "Raiders of the Lost Ark". That's her story and she's sticking to it. She doesn't want him to pine away for her because it gives her a sick thrill to have men dangling on the hook. That wouldn't be nice and she's always nice. Unless you're a cheater or a picky-face, that is.
Hypothesis: We've seen the last of this fellow. The only remaining obstacle is Liz having to endure Therese's pathetic pleas for forgiveness.