Traditionally, managing the lifecycle of data in workflows at Booking involved ad hoc tracking and custom logic to handle data changes. With the adoption of data assets, we now have a standardized way to represent, version, and evolve data over time. In this talk, I'll introduce how data assets are implemented at Booking, how versioning is handled under the hood, and how our workflows are built to consume and respond to these evolving assets. I'll close with a real-world example that shows how data assets help us ensure consistency and traceability in a complex production workflow.