- I am the Princess of Wales. I come as the king's servant and with his authority.
- To do what?
- To discuss the king's proposals.

13 seconds sound clip from the Braveheart (1995) movie soundboard.

You can hear this line at 01:46:37 in the Blu-ray version of the movie.

Quote context

[...]

- So whom do I send? Whom do I send?

- I'm dreaming.

- Yes, you are. And you must wake.

- I don't want to wake. I want to stay here with you.

- And I with you, but you must wake now.

- Wake up, William. Wake up. William, wake up, wake up.

- William!

- A royal entourage comes, flying banners of truce and the standards of Longshanks himself!

- I am the Princess of Wales. I come as the king's servant and with his authority.

- To do what?

- To discuss the king's proposals.

- Will you speak with a woman?

- I understand you have recently been given the rank of knight.

- I have been given nothing. God makes men what they are.

- Did God make you the sacker of peaceful cities, the executioner of the king's nephew, my husband's own cousin?

[...]