How to add a plus one to a guest

When you add a guest theres an option to link guests and you can add them there.
The guests part is a little tricky if you dont know their plus ones name. So we just put John Doe Guest as their name and left a note to message us their guests's name.

Where is the option to link a guest? I can’t find it.

View Quoted Comment I belive you can only do it on the computer and not the app.

You have to do it on computer

Yes only on computer but instead of John Doe or Jane Doe put the first name as Plus and last name as One then write message us with guests name, it looks better that way!