Note : Each and every chat message can be replied back with the message encapsulated to it.
On the user chat window, hover your mouse on the sent or received chat message, Click as directed by the arrow as shown from the figure below.
A collapsible drop-down menu is opened.
Select as directed by the arrow from the below figure.
The message which you have selected to send a reply for, has been encapsulated.
Type your reply in the chat type area as shown from the figure below.
When a sent chat message is being replied, the message gets encapsulated with the denotation "Me", as shown in the figure below.