Twitter Project using the API

I am looking for a twitter developer that is able to use the API to respond back to tweets containing a specific quote. Lets say for example an artist YXZ has just done a remix of "New York" by Frank Sinatra. We want to @reply every user that mentions "York" & "Sinatra" in their tweet with a customized reply such as "I see you like Sinatra's original New York song.. but have you checked out ZYX's remix?" It's a simple concept, and it has been done already. Please also be aware that twitter has an API limit that we don't want to disturb. We are in need of a developer to move this project forward. Thanks! (=