Where to store data between booking stages?

Question

Django

Probably many have seen how the reservation of a seat on an airplane, a hotel room or some kind of event takes place. The booking process itself is divided into stages. Basically three steps:

• the first page is data entry.
  
• the second page - display of the first data and input of the second.
  
• the third page - displaying all the data and a button to confirm the reservation.
  

The question is: where and how to store data between stages? Now I manipulate them from request to request, but this is incorrect and unsafe.

Answer 1

In session.