How do you change the URL alias of a contact form? Sounds simple enough, right? I can't find it anywhere. My contact form's path remains:

/contact/contact_us


And I have no idea where to change this. I have checked under the form settings at: 

/admin/structure/contact/manage/contact_us


Which leads me to believe that perhaps all contact forms are in the structure:

/contact/[FORM_SYSTEM_NAME]


Is that the case or is it possible to change it?

UPDATE

What I really want is a simple ALIAS field per contact form, so I can set the url alias myself?
I went under Configuration --> URL Aliases, and added a new alias for /contact-us that points to /contact/contact_us

I expected the result to be that anyone typing in /contact-us would end up at /contact/contact_us, but instead the opposite is happening. Anyone typing in /contact/contact_us is now redirected to /contact-us and the page is shown there.

This is a little different from how Drupal 7 works, but this is the answer I needed.