Settle at least one deal via useme to enable the posting of multiple versions of offers (e.g. cheaper and more expensive).
The user gives the date when he would like to use the service, the number of people, chooses from several price packages, then selects from several sentences - those that describe him most. Makes a payment. Then the responsible person enters the trip components together with the hours into the system. Then the application at the designated date and time presents the user with a ready message along with the route (google maps): current location> destination.
Price is negotiable, more information in a private message.