It would be nice to have that feature. This way the user can be guided.
For instance, the first message the bot sends is:
Hello, I’m the news bot. What topic do you want to know about?
If the user clicks on the WORLD button, it would let the bot know that, and inmediately reply to the user with a news related to the world.
It can be pretty useful to guide the conversation, and make the user not write. Facebook, Skype, Slack, Microsoft Teams, etc already support this. Since Twitter is entering the world Direct Message bots, it would be nice to have a feature like this.