“at carousel three”
At an airport, a carousel is the rotating belt that delivers checked bags. The word originally refers to a merry-go-round at an amusement park.
A2-27 / CEFR A2 / EPISODE 27
Reporting missing luggage
SceneAt an airport baggage counter. Tina asks about her bag.

WORDS & CONTEXT
At an airport, a carousel is the rotating belt that delivers checked bags. The word originally refers to a merry-go-round at an amusement park.
Can't miss it means something is so noticeable that it is easy to identify, often in directions or descriptions. Tina means anyone would recognize her large bright-pink bag, rather than that she herself will not overlook it.
Here this means the claim tag you receive when you check a bag. The agent takes Tina's receipt and uses the number on it to trace where the bag went. The bag is not suddenly found just from its color and contents.
"Oh, what a relief!" This expresses relief when something you were worried about turns out fine. Tina is relieved first of all to learn that her irreplaceable star map is coming back with the bag.
A joke that treats the bag like a person who had a better vacation than its owner. The did in than I did is used to compare without repeating got. The punchline is that Tina, relieved that her star map is coming back, envies her bag for getting to go all the way to Paris.