- You're certain she'll recover, Dr. Lefort?
- Definitely.

3 seconds sound clip from the Phantom of the Opera (1943) movie soundboard.

You can hear this line at 00:46:30.147 in the Blu-ray version of the movie.

Quote context

[...]

- Mademoiselle DuBois, you must go on at once. Madame Biancarolli has been taken ill. Please get changed quickly.

- Claire! Claire! Where is that clumsy wardrobe woman?

- Claire, get Mademoiselle DuBois changed at once. There isn't a moment to lose.

- She was drugged. There's no doubt about it.

- Now, who the devil would want to drug her?

- I'm sure she over-ate.

- You're certain she'll recover, Dr. Lefort?

- Definitely.

- What am I doing here? I should be onstage! I...

- Doctor!

- Madame...

- She'll be all right now.

- Why is she singing? What is she doing out there? What's happened?

- Please, madame, control yourself. I assure you that...

- Come to the point, Amiot.

[...]