Startup Idea : make money by travelling

sending couriers in india are very time taking process ,and it takes minimum 4-5 days and suppose you are living in bombay and you want to courier something to delhi then it will easily take days or even weeks. so, the thing which i am saying is that:- 1. total no of people travelling in india daily by train is greater than total population of australia. 2. i.e; so many people are travelling daily from one city to another. 3. if we can create a third party platform which can connect the people wanting to send couriers from suppose bombay to delhi , to the people who are actually travelling from bombay to delhi. 4. then in that case the person travelling can make easy money by just carrying the package from bombay to delhi. 5. and also the courier which would have taken multiple days is now getting delivered within a day.