There are different ticket types that you can choose from. For example, you can choose generic when you just want to know more about the details of the person who is booking the ticket and not the number of tickets that are being purchased. Complex tickets are tickets that come with special needs.
For example, the ticket has been purchased from an early bird promo so that is a complex ticket because the pricing is different. Ticket assignment is a type of ticket that specifies the number of tickets bought plus the details of the customer who is purchasing. All in all, there are 3 ticket types.
