How do I quote a text message?
To quote a text message, tap and hold it until the context menu appears. There, tap the quotation mark icon, and the quoted message will show up above the text input field. You can then compose and send your message like you usually would. In the chat, the quoted message is indented and prepended to your new message so that it’s evident what you are referring to.
On Windows Phone, this feature is not yet available.