Read the following dialogue and answer the question.

Milea: My mother told me an interesting story before I went to bed last night.
Dani : (I) ___________
Milea: It’s a girl who was born from a cucumber.
Dani : It sounds interesting. (II) ____________
Dani : I did. It was a thrilling story.

What is the most suitable expression to fill the blank in point I?