I can assure you, sir, there are other women.
3 seconds sound clip from the Back to the Future Part III movie soundboard.
You can hear this line at 01:16:05.903 in the DVD version of the movie.
Quote context
[...]
- Okay, I ain't your papa. Just don't want to see you do the wrong thing.
- And you can leave the bottle.
- Oh... Clara was one in a million. One in a billion. One in a googolplex.
- The woman of my dreams, and I've lost her for all time.
- I can assure you, sir, there are other women.
- Oh, the future. Oh, I can tell you about the future.
- Oh, man, did I sleep. What time is it, Doc? Doc?
[...]