That was my idea. Whoever had the keys was about to be captured and searched, and killed if they had the keys on them. So they ditched them in sovay's pocket. They are hoping she did exactly what she did (call the stores and give contact info) and will be calling the bookstore or restaurant as soon as they can get free of pursuit and find an untapped phone.

The question is whether this is in the middle of the story and sovay is merely "Woman in Bookstore," or whether that's the first scene and she is a main character. It's probably up to her.