Quote from Roz in Three Valentines
[Roz answers her phone] Roz: Hello. Frasier: Roz, it's Frasier. Look, I need your help. Roz: Well, I don't have much time, I'm on my way out. Frasier: Okay, just answer me this. How do you know if you're on a date? Roz: Are you alone? Frasier: Yes. Roz: Then you're not on a date.