Where most likely are the speakers?

W Hello, front desk? This is Mary Beth Jones in room 612.1 am waiting for a package. Has it arrived yet?
M Just a minute, Ms. Jones. I’ll have a look. No, there doesn’t seem to be anything here.
W Could you also look under S? It may be addressed to Mr. Simpson, my secretary. It should be in a red envelope.
M Yes, it’s here waiting for Mr. Simpson. You can pick it up at the front desk anytime.