John is flying from New York to Los Angeles. When he arrives at the airport, he goes to the check-in desk.

Agent: Good afternoon! Where are you flying to today?

John: Los Angeles.

Agent: May I have your passport, please?

John: Here you go.

Agent: Are you checking any bags?

John: Just this one.

Agent: OK, please place your bag on the scale.

John: I have a stopover in Chicago – do I need to pick up my luggage there?

Agent: No, it’ll go straight through to Los Angeles. Here are your boarding passes – your flight leaves from gate 15A and it’ll begin boarding at 3:20. Your seat number is 26E.

John: Thanks.

Now, he is going through the security check point…

Agent: Please lay your bags flat on the conveyor belt, and use the bins for small objects.

John: Do I need to take my laptop out of the bag?

Agent: Yes, you do. Take off your hat and your shoes, too.

(he walks through the metal detector)

 [BEEP BEEP BEEP BEEP]

 Agent: Please step back. Do you have anything in your pockets

 – keys, cell phone, loose change?

 John: I don’t think so. Let me try taking off my belt.

 Agent: Okay, come on through.

 (he goes through the metal detector again)

 Agent: You’re all set! Have a nice flight.