Send form submission to facebook inbox

Write a simple script (Facebook app) that can send a message from an HTML form into facebook inbox, using facebook API. This is a kind of a contact us form on a website that send the submission to the site owner facebook inbox. 1. site owner grant the app to send him messages. 2. site guest enter the site and click on Facebook connect. 3. site guest fills the form and click submit. 4. the message is being sent to the site owner Facebook inbox as a message from the site guest (initiate a chat or messages thread between the two Facebook users, the site owner and the site guest) needs to be written with PHP.