“This suite just opened up.”
For reservations, seats, or rooms, open up means to become available, often after a cancellation. A suite has just become available.
B1-25 / CEFR B1 / EPISODE 25
Checking an alternative and its extra cost
SceneTina is at a travel agency, choosing a cabin for a week-long cruise. She wants a good view of the ocean.

WORDS & CONTEXT
For reservations, seats, or rooms, open up means to become available, often after a cancellation. A suite has just become available.
I'll take it. selects an option in shopping, bookings, or house-hunting. Here the customer chooses the newly available suite. Compare I'll take 5B. in B1-23.