I think I am the best candidate for your project. Reasons being:
1) I have 946 friends on Facebook. Which makes me a very social person that can spread the word about your chat services;
2) I uses chat services on average every 2 minutes. Whether it being texting, Facebook messenger, What's app, snapchcat, etc...
and finally
3) I will use your chat services from every angle and leave a very thorough feedback.