If you wish to change the starting time or date of the confirmed booking, please contact your host directly here and simply agree on a new date and time together.
To update the starting time, go to the "Details" section of the booking, and click 'here' next to the "Do you want to reschedule or cancel this booking?" question. This will allow you to choose a new time for your booking from the agenda of your host.
If you, however, wish to include more people to your booking or some of your friends cannot make it to the experience, please contact Withlocals Support team here: firstname.lastname@example.org