Change your default Reply Now messages
You can select one of the three default Reply Now messages to send to a caller instead of answering an incoming call. You
can change the default messages or compose a new Reply Now message.
In the Phone app, swipe down from the top of the screen.
> Reply Now.
Tap the message you want to change.
Type a new Reply Now message.
To prevent the Reply Now icon from appearing when you receive an incoming call, turn off the Reply Now switch.