Turkish Airlines generally operates through regional sales offices or ticket offices in major cities like New York, but they don't typically have a dedicated, staffed Las Vegas office for direct customer service; for bookings, changes, or support in Las Vegas, you'd use their website/app, call their main support line, or find them at McCarran International Airport (LAS) check-in counters, if operating flights from there, though it's best to verify flight status directly on the official site.