As you are playing, you will be given the following 3 dialogue choices:
1) Clearly, you can still chat.
2) Hang in there.
3) I mean, I can't move my arms either.
Choose the first one for this achievement. Note that there is an achievement tied to third choice as well, which means you need two playthroughs to complete the game.
If you prefer image/video, full visual guide here: