If you cannot trigger the text options, ensure that Mitch has successfully entered his truck during the "With a Little Help From My Friends" mission before you get into Panam’s truck.
The best way to respond depends on your goals for the story: Response: "No idea."
Instead of replying via text, you can physically go back to Saul at the Nomad camp and tell him about Panam's plan. Rewards: A free Mizutani Shion "Coyote" (red variant). A large sum of Eddies (€$27,000). If you cannot trigger the text options, ensure
This permanently kills the romance with Panam and locks out the Aldecaldo ending for the game. Troubleshooting Tips
If you are referring to the quest "With a Little Help From My Friends," Saul Bright will text you asking for Panam’s location. A large sum of Eddies (€$27,000)
"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 and keeps you in her good graces. "I'm not her keeper" is also a choice,
The text typically arrives shortly after you reach the locomotive control tower.