Parent slug not showing for child page

Hi there,

I have the following problem: I create a new page and set it as child to the other page, but permalink doesn’t reflect that. Here’s the example:

sample.com/photos
(that’s my parent)

I’m creating page titled “Cars” and set it as child to page “Photos”, I’d expect to get permalink like so:
sample.com/photos/cars

but instead I’m getting:
sample.com/cars

Any assistance will be greatly appreciated