All of the airlines websites have also been migrated to AWS.
One result has been a large increase in mobile bookings, which have recently surpassed bookings from desktop computers.
Design and development on AWS is now highly iterative, using the platforms auto scalability and the ability to release new functionality at any time.
Meanwhile, Oscar is learning fast. Since launch his rate of successful conversation completion has increased from 25% to 62% and he can now offer help in 21 knowldege areas, up from just four.
The journey has been from a monolithic mainframe-based environment that was diffiult to manage and even more difficult to change, to a serverless cloud environment powered on API integratration and "everything as a service".
Payments start-up Pushpay has also delivered value to its customers from AWS.
In a separate keynote, VP of engineering Josh Robb explained how the company had addressed its customers' compliance headaches by using AWS Lambda to produce PDFs for clients to use in their US tax reporting.
The six week project reduced an estimated 40 hours work per client was reduced to around four hours.
52,000 such PDFs were produced in January and February, Robb said, all for a total payment to AWS of just 3 cents.
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