Setup a timed event to trigger Emails/SMS to send
There are a few issues in the way WordPress sends emails and you may need to make some adjustments in order for emails/sms to send at the correct times.
New bookings confirmation are sent straight away and do not require any special configurations.
Status change notifications and reminders are sent using the WordPress. As such a cron job may need to be configured if your traffic content is low or you find the notifications are not being sent. If there is a message to be sent it is dependent on a visitor browsing your website in order to actually activate the sending of the email.
One of the ways you can combat this unknown timing is to setup a Cron job to force it to send on a regular basis.
If you are using cpanel something like:
wget -q -O /dev/null https://my-site.com/wp-admin/admin-post.php?page=latepoint&route_name=reminders__process_reminders
Basically anyting that can visit the above url will trigger LatePoint to send.