Saving a pdf without the presaved data

Hi all. I'm a newbie on LiveCycle and I'm having trouble on saving a pdf without the presaved data.

I'm working a project in which the pdf form must generate a number based on Epoch & Unix Timestamp.

The pdf should generate a number every time a user(s) opened the pdf and when a user decide to close the pdf, a save dialog box should appear.
I successfully created a form using Adobe Acrobat DC Pro but I can't do the same on LiveCycle.

Is there any codes or "Clear form" on LiveCycle before saving to pdf?

sample.pdf - Google Drive