How do you write in third person limited?

To rephrase a statement with a first person point of view to a statement with a third person point of view, you must change your first-person pronouns (I, we) into third-person pronouns (The name of the peron doing the action).

Here is an example:

First person: "I must go now," I said.

Third-person: "I must go now," Heather said.

As you can see, you may, or may not, have to change the first-person pronouns in the dialog.