Url rewriting on custom post with CPT UI plugin

I checked all subjects in forum about this but i didn't found way to resolve my problem. sorry for my english, i'm french.. :)

So.. i got a custom post listing ( with template listing pro ) there : http://easycowork.fr/bureau/easy-office-lille/

I created a custom post named service and i display all service associate on listing on the listing single page. When i click on a service, i display his data on the same page with a GET parameter ( the service id ) like this : http://easycowork.fr/bureau/easy-office-lille/?show_service=196

But i need the name of service instead of show_service=196 after the name of listing "easy-office-lille"

How can i do that ? I'm really lost in url rewriting

I use Custom post type UI plugin to create custom post, I added rewrite option to true, and Custom Rewrite Slug option to service and registered permalink but that didn't work.

Thanks for help !