Startup Idea : Free to talk!

I see some gap in the dating. I experienced on the street, many times, that i just want to talk with some strangers, but i didnt know if he/she has spare time/has mood for talking/ has interest. So my idea is create, probably mobile app, which every who wants to talk with anyone on the street, download it to his/her mobile phone. Then i can search another in my near neighborhood and start talk... But this is just the basic idea, with more possibilities. I can just sent message first to strangers, see his status, etc...