Start with the situation, not a lock name
You can say that the handle turns but the door stays shut. Or that the key snapped and one piece is still in the lock. These are useful descriptions without knowing the name of the hardware. Mention any damage that was already there, along with an attempted repair or a tool left in the lock.
If you are safely outside, check whether someone nearby has an authorized spare. For a rented home or managed building, contact the person responsible for the entrance. If someone is in immediate danger, call 911 first.
Which door are we talking about?
Dallas addresses can have several ways in. A street entrance, a parking entrance and the door to a particular unit may all use different locks. Give the address of the problem and explain which entrance is involved. A floor, building letter or parking level can prevent a search at the wrong door.
Access has to be authorized. If your identification or paperwork is inside, explain that when you call so the available ways to confirm permission can be discussed. A building name alone does not establish permission to change a shared lock.
An opening and a replacement are different decisions
Getting back inside may be the whole job if the key is on the table. If the keys were lost or taken, you may also want to discuss what those keys can still open. Sound hardware may be suitable for rekeying; damaged parts need a separate assessment.
Ask what the proposed charge includes and which findings could change it. Confirm the current arrival estimate rather than assuming a fixed response time. Before agreeing to new parts, ask why they are needed and what will remain on the door.
Do I have to replace the lock after a lockout?
A lockout alone does not establish that the lock needs replacing. The hardware, cause of the problem and opening method need to be checked. Missing keys raise a separate question about future access.
Can I arrange help for someone else?
You can make the initial call, but the person responsible for the property or vehicle needs to authorize access. Explain who will be present and how permission can be confirmed.