The Sponge - S7-E9
Pharmacist: Can I help you?
Elaine: Yeah, do you have any Today Sponges? I know they're off the market, but I was...
Pharmacist: Actually we have a case left.
Elaine: A case? A case of Sponges? I, I mean a case. Hah. Uh... H-how...? How many come in a case?
Pharmacist: 60.
Elaine: 60? Um... Well, I'll take 3.
Pharmacist: 3.
Elaine: Well, make it 10.
Pharmacist: 10?
Elaine: 20 Sponges should be plenty.
Pharmacist: Did you say 20?
Elaine: Yeah. 25 Sponges is just fine.
Pharmacist: 25?
Elaine: Yeah.
Pharmacist: You're set with 25?
Elaine: Yeah, yeah. Just give me the whole case, I'll be on my way.
Answer: The name is Delores. He shouts that name at the end of the episode. Then in a later episode, "The Foundation", he runs into her. And he repeatedly calls her Delores.