Can you imagine God using you to save a town? He can use anybody. The woman at the well  was clearly not in a position to witness to anybody according to men, but God used her testimony and life to save a town. How many people were in Samaria? Jesus used his life as a example of reaching the loss. The Holy Spirit led Him and used Him to reach everyone. If the same Jesus who God rose from the dead lives in us then we can be used to reach a town or city for our Lord.