Heh heh heh! Certainly. Certainly.
4 seconds sound clip from Scooby-Doo, Where Are You! - That's Snow Ghost (S1E17).
You can hear this line at 00:02:34.346 in the Blu-ray version of the episode.
Quote context
[...]
- Wow! What a run-down and creepy place for a weekend of skiing.
- I know, but it's the only place we could find. Come on. Let's go in.
- Welcome to Wolf's End Lodge. Heh heh heh!
- We have all the comforts of home.
- Yeah? Whose home? Dracula's?
(Excuse me for interrupting, but could you put this suitcase in a safe place for me, Mr. Greenway?
- Heh heh heh! Certainly. Certainly.
- Nice doggie. Heh heh heh! Nice doggie. Heh heh heh!
- That's Mr. Leech, another guest. Heh heh heh!
- Now, if you will be so kind, I'll show you to your rooms.
[...]