How can I create a contactform (Vega template)

Hello there,

I had such great help yesterday! So let’s try again today.

I like to create a contact/ booking form, but I don’t have a clue how to do this.
I can create a page, but I can’t seem to create the form itself… I know it is possible because there are demo pages, with contact forms…

Can anybody help me on my way?

Thank you in advanced!