He frowned at the little wooden means of transportation, scratching at his cheek and weighing the pros and cons of this situation out in silent musing. Though he heard all that Davy said, he didn't look at him, still staring in unease at the dingy. "How kind of you to be so thoughtful, Davy. Let no one say otherwise." His tone was neither sarcastic, nor sincere.
Cordelia's lack of fear earned her a incredulous look from Jack, confused that she was taking to this far to lightly. "You are awfully cheerful for someone who is about to be sent to the Locker. And let me tell you, it is not a very cheerful place there. You can go mad and start...seeing things." Multiple Jacks weren't very fun to talk to at all after a while. And he always worried that they would mutiny against him and pick another prettier Jack to captain them.
Still, he led her to the dingy and, once they had settled in, rowed them out a good distance. He wanted to be rid of Davy in the sense of servitude, but he did not want to sever any ties from home. Cordelia was mighty confident that she would come back and had means to retrieve the Flying Dutchman. It was enough to convince Jack to not fake her death and shoot just short of her head into the water. It was enough to make Jack actually kill the Seer...but not before last words. "Err, so d'you have any last words, love?"