Once you're far enough in the main story to have the mithril pickaxe, a new dialog will unlock for Sandra. She wants to look for Bob, who is at the Wooden House in Begus, where you got the mithril lockpick from Glen.
yes I have the story done up until the time skip. I have done this quest before, but I lost my data so I had to restart. So I cant remember what I am doing wrong because I cant get her dialogue.
