You may need to create a contact form targeted at users with accounts on your WordPress site. You already have basic information about the user (name, e-mail, etc.) so asking users for this would be redundant.
You can set the logged-in user’s information as the default value by adding several options to a text field.
|User’s login name|
|User’s email address|
|User’s site URL|
|User’s first name|
|User’s last name|
|User’s display name|
Your Name: [text* your-name default:user_display_name] Your E-mail: [email* your-email default:user_email]
Users who are logged in will notice that the basic information is already completed.