Design System for Processing Different Types of Tickets

Design a system to handle multiple types of tickets, where each ticket type has different processing logic. Describe the design of the system and provide a code implementation. Requirements: Support at least three different types of tickets. Provide specific processing logic for each ticket type. Implement a registration and processing mechanism for ticket types. The system should be easily extendable to accommodate new ticket types in the future. Provide a few code snippets to demonstrate the creation and processing of tickets. Test Cases: Input a request containing various types of tickets. The system should call the corresponding processing logic based on the ticket type, and output the processing result for each ticket. Example Input standard premium vip