Dynamic Page / Prefilled Form Field (s)

Hi,

I gave up on this last year but I’m giving it another shot.

I am trying to create a form on a dynamic page of tours I offer. I’ve succesfully created the dynamic pages of all my tours, but now I want to add registration. I can link a basic form, but it does not allow me to see where the registration came from.

How can I prefill a text field with the "title from my tourDatabase, and then have it submit to a separate registrationDatabase.

I appreciate any help and thank you.