As far as Jedi were concerned, Obi-Wan's mental Force abilities were quite impressive. Unfortunately, where telepathy was concerned, he was no different than the average man. Well, he could feel that she was the one looking for him. And that she was trying to convey something to him. But it was just a feeling. He thought he could make out a few words of what she was sending him. Please and hear. But that was only from her end of powers. His own were limited to the receiving end. Perhaps if he had six hundred some years under his belt like Master Yoda, he'd be more useful, but he that wasn't the case.
He did approach her though. Still somewhat cautiously. He wasn't entirely convinced that she wasn't the cause of this city-wide silence. He climbed the few steps to the main platform of the pagoda and over to the railing she sat upon.