public string CarPickedUp(string bookingId)
{
Booking booking = r.PickUpCar(bookingId);
string response = booking.Id + ", " + booking.RentalCar.RegNumber + ", " + booking.RentalCar.Model + ", " +
booking.Renter.FullName + ", " + "Pick-up status: " + booking.IsReturned;
return(response);
}
