Well, I'll certainly try, sir.
3 seconds sound clip from the Trading places (1983) movie soundboard.
You can hear this line at 00:12:46 in the Blu-ray version of the movie.
Quote context
[...]
- Oh, Clarence Beeks. Oh, yes, of course.
- He's doing something top secret for us.
- Never forget she's our grandniece - you'd better make an honest woman of her.
- Well, I'll certainly try, sir.
- Actually, the wedding invitations go out this week.
- Don't worry about this. I'll take care of this one personally.
[...]