Confluence - how to insert a contact form into a Confluence page?

We are using Confluence and would like to direct our customers to our new online help section when they click on a “?”. We don’t want to invest in Jira Service Desk yet but would like to find a quick and painless solution for our clients or potential clients to contact us by email.

How do you create those forms on your pages, like this one “Contact us”?

I searched in the macros but could not find anything like that. Thanks!