A spare may be closer than you think.
If someone you trust has a working spare, check with them before arranging a visit. For a managed building, contact the person responsible for access. A front-desk key and a key to your own apartment aren't necessarily handled by the same person.
A place we can actually find.
International Boulevard covers more than one entrance, business and parking area. Give the street number, suite or building name, and the door you're standing at. At a car park, the operator's name and your row or level are more useful than saying you're near the airport.
Agree what happens to the lock.
Ask how entry will be approached and whether changing any hardware is part of the proposed work. A locked door doesn't automatically call for a new lock. If inspection changes the plan, ask for that change and its price to be explained before it goes ahead.
Once you are back inside.
A key left on the kitchen table is different from one you cannot account for. If the missing key could still open your home, consider changing which key the lock accepts. A door that was already sticking may also need a separate repair.
Can a locksmith just unlock the door?
Sometimes getting the door open is the whole request. A working key left inside does not, by itself, mean the cylinder or handle needs replacing. A failed mechanism, damaged key or door that was already difficult to close can change the work involved.
Keep those decisions separate. First establish the entry problem. Then decide whether anything needs repairing or whether an unaccounted-for key should stop working. If replacement is proposed, ask which part has failed and what will happen to the existing keys.
What affects the cost of a lockout?
The type of opening, its condition, the access arrangements and the work agreed all matter. A visit charge, entry work and replacement hardware are not necessarily the same item. Ask for the full proposed charge and which circumstances could change it.
A phone description has limits, especially when the lock has failed internally. If an inspection reveals a different problem, you should understand the revised scope before agreeing to it. A price for opening a standard door should not be treated as a quote for every lock or access system.
A shared building has another layer of access.
Being outside your own unit and being outside the building are different situations. A manager may control the lobby entrance while you hold the apartment key. Explain which door is blocking you, and whether a responsible manager can help. For a workplace entrance, see business access and authorization.