Then you must be John McClane.
3 seconds sound clip from the Die Hard (1988) movie soundboard.
You can hear this line at 00:12:04 in the Blu-ray version of the movie.
Quote context
[...]
- I couldn't agree with you more. Why don't I talk to him right now?
- Hi. I'm looking for -Holly Gennero.
- Yeah.
- Then you must be John McClane.
- Nice. I have you to thank for that?
- Seemed the least we could do.
[...]