Display message only

Hi,

I liked the simplicity of this form. However, is it possible to display messages only in the message box instead of all the details of the sender?
As you can see in the screenshot (https://imgur.com/a/NW47ZcV), how do I remove the circled part from the message box? It would be better to display Name, Email, Subject, Date in the header and message only in the message box as other plugins do.