Especially in the business world is essential the order confirmation via email. This contains key information about the job as an Internet link with the arrival of the tax can be followed live on the monitor.
If the customer requests an order confirmation via email, it's just their email address when ordering and automatically receives the desired taxi booking confirmation by email.
Of course, he can also store data in its customer base, the e-mail address. In this case he gets with each order an order confirmation via email.