How do I make my booking form open in a lightbox when I click a button?

Hi again,

The following guides should help:

How to Create a Lightbox Form

How to Stylize Feedback/Lightbox Title

Adding parameters in Lightbox and Feedback forms

Other lightbox related guides are available here. However, if you need further assistance, please let provide more details about what you wish to accomplish.

Thanks

Actually, the following guide should be more suited to your requirements:

Creating a Feedback Button