is it possible to cretae alert in calendar list for: The person that created the meeting (item) will automatically receive notification when there is a change?
Create a view with a filter of Created By is equal to [Me]. Then set up the alert for when exsisting items are modified.
However this would mean setting up an alert for each person who can create calendar events.
An easier way would be to use a SharePoint Designer workflow which runs on item modified and e-mails the person in the created by field.