Form followed by Form

I've developed an sqlite plugin that creates a new form action 'sqlite' and takes form data and puts into a table (eg. people).
The plugin works fine. Except I want to have an intermediate step. So the user sees the form and has two buttons <continue> and <cancel>
If the user clicks on <continue>, then the form is processed again with the data being sent to the database.
I cannot figure out how to get the extra step.
I have tried putting an intermediate process, eg.

form:
  name: xx
  fields:
    -name: ff
     type: text
 buttons:
   -submit
     type: submit
  process:
    - sqlite
        table: people
    - sqliteConfirm

This works except it executes immediately, that is, the data from one step is not passed to the next process.

I've tried a couple of different ways, but can't find an approach that works.

Any suggestions?