title: Save user information DialogFlow
body: <p>I am starting in <code>Dialogflow</code> and I would like to know if the information I keep from a user in a database, be it <code>Firebase</code>, that this information could occupy it to put it in a web page.
  An example is the user's email stored in the database to be able to put it in a page where I am asked to enter with mail so that the user does not have to manually enter it that <code>Dialogflow</code> does.
  What I am looking for with <code>Dialogflow</code> is to make the user able to pay from the created chat of <code>Dialogflow</code> in a web page only entering once his data and that the application does the rest collecting the saved data.</p>