Time stamp for each text message entry on Message

When I, or someone, starts a text conversation there is a date and time stamped at the beginning, but not for each entry into the conversation. In my job, it is important to note when I send and receive messages with in a conversation. Sometimes there may be an hour or more between conversation entries, but to look at it, it looks like a back and forth conversation.

Is it possible to display a time stamp for each entry in a text conversation? Either sending or receiving text messages?

[Re-Titled by Moderator]