Provide the theme summaries for the following conversation: 

Sam: I lost my car keys I think
Eric: Surely not, just look for it carefully
Julia: you always "loose" things and find them 3 days later somewhere at home
Eric: hahaha, exactly, I've heard it so many times already
Sam: but I haven't been home even
Eric: so where did it happen?
Sam: in the city
Eric: ask in all the shops/offices you've been today, people mostly keep an eye on this kind of stuff
Sam: right, I will, I'm just a bit panicked 

Summary: 
Sam lost his car keys in the city.