"Oh, you're French- eh, bonjour," Gatsby responded. His only exposure to French had been during the war, and he wasn't sure that he remembered much at all. He was visibly relieved when the newcomer switched to English that was far better than Gatsby's French.
"I might have. What are they called?" he asked, figuring he could at least check in the phone for him. It was unlikely that they would be there, but he couldn't very well let him just wander aimlessly without a clue. Not in this place. He might get eaten!