An employee invites colleague to lunch

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— Hey Ellie. We're going to Lucky Dragon for lunch. Want to come?
— I can't. I'm covering the phones for Scott. He had an 11:30 dental appointment.
— Oh that's too bad. Want us to bring you something back?
— Yes, thank you. I'll have the Kung Pao Chicken with Chow Mien. Could you hand me my purse, please?

Q1

What is the relationship between the speakers?

a

Professor-student

b

Applicant-manager

c

Customer-service worker

d

Colleague-colleague

Q2

Why can't the woman go to lunch?