Lauren: Hi all! Could someone take the night shift for me this Friday? My child is sick.
Dennis: Again!
Lauren: Well, sorry, but it's not like I have any choice in the matter. When he's sick, he's sick.
Mickey: Shut up, Dennis, you're away this week anyway, so it's not like she was asking you. I can take that shift for you, Lauren, but could you take mine next Thursday? I have a doctor's appointment.
Lauren: No problem! And thank you, Mickey!
Mickey will take Lauren's shift this Friday. Lauren will take Mickey's shift next Thursday in exchange.