I had to fly to Montreal for a business trip but when I got to the airport I was told that I was on standby because I had no confirmed seat when the travel agency system booked the flight. I was asked if I was flexible on my time and I had to say that I wasn't. The staff were very nice and helped to get me on the flight on time.
I called Air Canada's 1-800 number to confirm my return flight so I wasn't on standby again and I got right through to an agent and she was able to book the seat in about three minuets.
Overall, a great experience for an airline company.