- You're sure you think you're sure you can, right?
- Yes, I think I can.

6 seconds sound clip from the The Loved One (1965) movie soundboard.

You can hear this line at 00:06:04 in the Blu-ray version of the movie.

Quote context

[...]

- Are you still with me, D.J. Jr., huh?

- Now, he's still English, he's still aristocratic, but he's got human warmth. Hmm? He's a human James Bond. Whew!

- Do you think you can handle that English accent, Dusty?

- Aw, shucks, I reckon I could if I just sort of snuck up on it.

- Well, I think Frank here could straighten him out on the accent bit.

- Is that right, Frank? You think you can?

- Yes, I daresay I could. I... Yes, I think I can.

- You're sure you think you're sure you can, right?

- Yes, I think I can.

- Yeah. What do you say, Dust? You think you'll feel at home with this? You feel it's right for you?

- You just turn him loose, D.J. Jr., and I'll try to ride him.

- OK. Harry? Look, this is your baby. I'll tell you what I want you to do. Hold it, fellas.

- Who? Oh, yeah. Yeah... just a minute. Frank... It's for you.

[...]