Here are some quick texts I've programmed in:
"Can't talk now. Driving..."
"Call you later"
"I'll get back ASAP"
"Get back to you later"
"Get back to you tomorrow"
. . . and so on . . .
To Edit, Add, Delete, and Move position of items in the message list, simply LONG-CLICK the item in the list.
Program in anything you want (sod off!) to select it later .. FIRST CLICK.
Reads your mobile contacts .. SECOND CLICK.
Confirm to send .. THIRD CLICK.
On the THIRD click you can select to EXIT, CANCEL, or Send Another.
A LONG THIRD click takes your message to your default SMS App in case you wish to further edit either the contacts or text itself.