And the winner is...
Becky!
I was on the flight 549 (YYT-YYZ) yesterday and the service was indeed nothing short of stellar. And this is due to the wonderful performance of Becky.
I had a chance to try the Prosecco (as mentioned above in this thread). It was properly chilled and served.
The turkey sandwich was great as well.
Overall, it was quite a memorable flight.
Thank you Westjet! ^