Improving the "booking page" for a taxi booking mobile application

I'm currently working on a taxi booking application and have got to the stage where I need to design the "Book" page where the user can create a new advance taxi booking.

The features are as follows:

• The user can set the start, waypoint (optional) and destination of their taxi booking
• The user can select the date/time of the taxi booking (it has to be an hour in advance from now)
• The user can specify the number of passengers currently on the journey
• The user gets an estimated fare, which they can increase/decrease (within a particular range)

Currently the form design looks very web-formish, any idea on how I can improve it and streamline it for mobile?