He may not be that old, but he was a Padawan at her age. That was practically a life time ago. So to him, she was a young one. His smile only broadening at her enthusiasm.

"Very observant, Rey."

He didn't know from what point in time she might have come from. But it was clear she was from his world and knew of the Jedi. This was definitely encouraging.

"I'm Obi-Wan Kenobi." He then motioned for her to follow him. "Come with me. There's much to talk about."