This is a bug in the default lotus template that OpenNTF started with.
The (ReplyNotice) form does not allow for canceling the action once it has begun.
To reproduce:
open a "Notice" document
Select "Request Information"
—Change your mind
The document has a save button, no cancel button.
The query close event has a popup that says
Do you want to send this notice with these comments?
Choose Yes to send as is.
Choose No to send without comments.
Choose Cancel to continue editing.
This is counter intuitive
The lotus code is somewhat complicated, and I don't fully understand the need for this complication, but, I created a button called "Cancel" with the following script.
bAlreadySent = True
Set ws = New NotesUIworkspace
Set uidoc = ws.CurrentDocument
Call uidoc.Close()