Saul

This protects Panam’s plan to steal the Basilisk and keeps you in her good graces.

The best way to respond depends on your goals for the story: Response: "No idea." This protects Panam’s plan to steal the Basilisk

"I'm not her keeper" is also a choice, though some guides suggest it may be less effective for the romance path. To Betray Panam (The "Snitch" Route) This protects Panam’s plan to steal the Basilisk