1. When you send a text message and know what the reciever will reply. Therefore, you already write out (pretext) - and possibly save in drafts- what you will respond in return.
2. Could also be used in instant messaging by pre-typing a response.
X: "What are you doing tonight?" (asking even though they know)
X uses pretext and writes and saves to drafts- "Oh i see- me too."
Y: "Going to a movie."
X: sends the saved draft of "Oh i see- me too."