NIKE RSVP twitter

Project Description:
There are some more specifics as well:
1) The DM's sent must be able to attach the specific hashtag sourced from the tweet posted and formatted as #specifichastag. Additionally, it must attach the #specifichashtag to pre-entered data containing the First Name, Last Name, and Shoe Size of an individual.

I am looking to be able to preload the app with a list of friends names and shoe sizes and once a target twitter account post's an RSVP tweet, the software will immediately send DM's, each from a different twitter account, in the specific format, with the random hashtag. The speed of the program is a priority, I want to be able to fire off the Direct Messages within 0-5 seconds from when the tweet is posted by Nike. Please get in touch with me if you are able to do this and we can discuss the project.

I need the program to work on Mac OS X 10.7 and up.

Example of the situation: A Nike Account User will post a tweet similar to this "Twitter #RSVP is now open for the Air Jordan 8 in sizes 7-12, 13, 14. #AJ8" Once the user posts this tweet, I want to construct an app that will automatically send a Direct Message to that same user containing some pre written text as well as the random hashtag, which in my example is #AJ8. An entire example of the complete DM I need to send back in response to the user is "Jon Doe, Size 10, #AJ8"

Thanks you for your time.