Avoid duplicate pages

Would pretty useful to have a functionality on Confluence just like we have on Confluence Questions. You start typing the title of your Question/Page and a popup shows a search of related content.

It would avoid that users create pages with content that already exist.

Example provided by the customer:
"User A creates a page called "Git setup" and a few days later User B wants to create a page called "How to setup Git". Once they've put in the title I would like a pop up asking them if the page they are about to create is going to be a duplicate of the existing "Git setup" page."