I was looking for a tool to do something like this - here is what I need, please let me know if EF does it (or KVS if the new version supports this)....

I want to setup a query between point A and B on a specific date, specific airline and specific flights that looks for availability in a specific inventory class, or anything below an inventory class threshold I set, or any combination of inventory classes I specify.

Here is an example:
Dep XXX Arr XXX
June 1 June 4
ABC Airlines
Outbound Flight 001 connecting with 002
Return Flight 003 connecting with 004
Any combination of the following booking classes: G, E, U

I want the query to check continuously, then alert me the moment inventory in my booking classes opens up so I can hit the website and grab the seat.