I need to include “Form_id” in mail after registration

Hi!
I am currently using CF7, CFDB7 and CF7 Conditional Fields. Well, I am using a form that works great, and registers every information in a database that I can download in CSV format, that’s pretty cool.
The point is that I would like to include the “Form_id” in the email that is sent to the registrant. Is there any code to do that? It should be just a message saying “Your registration number is [Form_id]” or something like that.

Is that possible? Thanks in advance for your help.

PS: With “Form_id” I mean the number assigned to each form completed by each user.

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