The response-texts are stored in the language-files - directory Garmin/Text.
Since there is no file for English language, you only can edit all other languages.
Be careful - it's a littlebit difficult to edit the file.
Each predefined answer is to be searched and replaced twice!
Make a copy of your language.gtt before editing it!
Are you talking about the startup text?
Device > Garmin > startup.txt
Check out the following link, you can also display how many seconds (1-10) for it to display.
https://www.dcrainmaker.com/2013/08/display-number-garmin.html
Sorry if I misunderstand, are you talking about something else, like emergency notifications?
I haven't found anything regarding that, tho I've heard it pulls a google map link. It doesn't seem to be covered in the manual, but I haven't gotten around to trying it yet due to all the responses about rough trails and roads triggering it.