Here are the completed sentences using reported speech:

5. “I don’t like this red carpet,” she said.
→ She told me that she didn’t like that red carpet.

6. Naomi said: “Keiko can’t help you tomorrow.”
→ Naomi said that Keiko couldn’t help me the next day.

7. "How do you know that?" Kai asked me.
→ Kai wanted to know how I knew that.

8. “I want a new jacket for my birthday,” she said.
→ She said that she wanted a new jacket for her birthday.