Startup Idea : Everybody can be despatch and earn money apps

This is the next big thing! I dont know how to explain, but i will make it in a story. David is a small business owner. Once in a while he got something to collect and something to deliver but the destination is not that far and David could not always leave his business and go to send/collect the thing. By using courier will be costly and to hire a despatch also will.be costly. In the other hand michael can help him because he is going to the same direction as david eventhough they didn't know each other. So david post his request on this apps and michael agreed to the price so he delivered the job and get his money in his pocket for helping david. Please come and participate be my co founder..