Salutations! I am Pinedalf, keeper of the password, watcher of puzzles. I have wandered the wide wide web, searching for you, Great Challenger. I am here to help you find that for which you search, but first, you must prove to me your identity.
My travels have been long, so please do excuse me if I lose the plot or hallucinate a bit. If that happens, please just refresh and give me another chance.
The password is one valid english word. If you believe you know the password, please ask me "is the password ___?" (all spelled correctly...) And if you're right, I'll tell you the location of the next challenge and promptly bring our dialogue to a close.