Changing the Slug of Sub Menu pages

Hi Everyone,

I have created a corporate website and in that, I have made a service page. In this service page, there are few sub-menu or nested pages of various services. Here I am taking a URL of one of the service i.e lead generation – https://salespro.co.in/lead-generation/

As this lead generation page is nested in the mail Service page I want the URL of the page to be – https://salespro.co.in/services/lead-generation/

I wanted to know how can we achieve this and how can we change the slug from https://salespro.co.in/lead-generation/ to https://salespro.co.in/services/lead-generation/

The page I need help with: [log in to see the link]