Final Quest

"Esther!" the nymph exclaims, her eyes shining. You stop dead. With the green dragon is none other than the queen of the nymphs who you met in the Forest of Darkness!
The green dragon looks from you to the queen of the nymphs, and back again. "You know this person?" he asks.
The queen nods, smiling at you. "She proved herself a hero," she tells the green dragon.
"What do you want?" the green dragon asks you.
"I bring a message from my king," you reply.
The dragon tilts his head at you. "You must submit to a mind probe so that I can determine whether you are telling the truth or not," he tells you. He turns to the nymph queen. "You must leave now."
The nymph queen does, squeezing your shoulder as she passes you. "Good luck," she whispers.
What do you do?