If your tour is cancelled by BestTours then you will receive an email and/or SMS notification 48 hours before the event letting you know the date you scheduled has been cancelled.
The first thing to do is log in to your BestTours customer account, and visit the Upcoming Tours section. Click the reschedule button next to the tour that has been cancelled, you will see 2 options:
Option 1: Reschedule the tour you were booked on to another time/date.
Option 2: Reschedule to another tour that has a similar departure time to the cancelled date/time of the tour you originally booked.
Don't worry, if your tour does get cancelled, the next date/time you reschedule to is a guaranteed tour time, and will always run. The only thing that might affect a guaranteed tour time is inclement weather.