Design an Online Ticket Booking System

Functional Requirements:

• Users can search for events (e.g., concerts, movies, sports) by location and date.
• Users can view event details, including available showtimes and seating options.
• Users can select seats and hold them for a short period (e.g., 5 minutes) before booking.
• Users can book and pay for tickets.
• Users can view their booking history.

Non-Functional Requirements:

• Consistency: Once a seat is booked, it cannot be double-booked.
• Concurrency: The system must handle multiple users trying to book the same seats at the same time.
• Scalability: The system should support a large number of users and events.
• Fault Tolerance: The system should handle failures gracefully, ensuring bookings are not lost or corrupted.
• Reasonable response time: A booking operation may take a few seconds, which is acceptable for users.