I was VERY impressed with a supervisor with AC Res in Toronto who on the evening of Dec 17 helped rescue my bosses' daughter from the LAS snow mess and got her to Maui.
AC's flight to LAS was delayed by 2+ hours on Dec 17 and so she missed her US cnx to SFO and then her UA flight to OGG. Snow in Vegas - ahah. Even though it was a UA ticket he took ownership of the issue (she was getting the run around at LAS) and while I suggested an AC flight to YVR and onto OGG on the 18th, he was ready to listen to all possibilities and made it happen!! The pax then had to get the ticket re-issued by UA ticketing at LAS but that went remarkably smoothly

She got the last seat on the OGG flight on AC so it was close. Shortly after we got it sorted AC downgauged the LAS-YVR leg to E90 and the flight then showed sold out! She got to the counter 3 hrs early, had a bit of a problem with "you don't have a ticket" comments but this was shortly resolved.
A little listening and a concern for the person involved can yield real long term benefits. While we all worked as a team to get this done, the AC Res supervisor ultimately made it happen, documented the file to the hilt and got the family re-united in Maui ^

In the end it was close, she ended up with only 1:10 in YVR to make her OGG flight.