- Give my love to your mother. 
- Yes. Goodnight, darling. 
- Goodnight, darling.
3 seconds sound clip from the Dead of Night (1945) movie soundboard.
You can hear this line at 00:44:17.708 in the Blu-ray version of the movie.
Quote context
[...]
- Hello?
- Hello, darling. Have a good journey?
- Yes. I wish you could've come.
- So do I. Still, it can't be helped.
- Of course I do. Do you miss me?
- Yes.
- No, I'm going to do another half an hour's work first.
- Good night, darling. See you Monday.
- Give my love to your mother.
- Flaxman 6061. Get me Chichester 2352. Thank you.
- Nothing.
- Mother, I want to speak to Mr. Rutherford.
- Would you go on to the library, and walk back this way?
- Good morning, Miss Walsh... I beg your pardon, Mrs Cortland.
[...]

 Dead of Night (1945)
 Dead of Night (1945)  Phantom of the Opera (1943)
 Phantom of the Opera (1943)  Scooby-Doo, Where Are You! (1969)
 Scooby-Doo, Where Are You! (1969)  Halloween III: Season of the Witch (1982)
 Halloween III: Season of the Witch (1982)  Knight Rider (1982)
 Knight Rider (1982)