The latest versions of Skype include suggestions for responses from Cortana. These are automatically generated responses to common types of messages that you can send with a single click or tap. They look like smart answers in Gmail.
To disable these suggested answers, click Menu> Settings in Skype for Windows, Mac, or Linux.
Click the "General" category in the left pane. Under Cortana, disable the "Suggestions" feature. You can now close the Settings screen.
The iPhone and Android Skype app works about the same.
In the Skype app, touch your profile icon, and then tap the gear icon to open the Settings screen. Touch the "General" option and then deactivate the "Proposal" feature under Cortana.
You can always return to Settings> General and reactivate Cortan's suggestions if you wish to use them in the future.