I am currently booked on JFK-SFO-HKG flight on AA/CX in F, using my AA miles for travel in October. On the way back AA just canceled a midday flight from SFO to JFK and now I have a 9 hour layover. I've been calling AA pretty regularly to see if a more direct route is available and had no luck so far.

Is there a website, similar to expertflyer.com or a travel agency which for a fee could check the availability for me daily? Any other suggestions?

Thank you!