Cortesía en la taquilla: pide entradas como un local
Dannis
Tickets in Spain: use polite forms with the conditional and modal verbs. Address staff with "usted." (For English speakers: this is like "I would like / could you…?")
Me gustaría… (polite: "I would like…"). Querría… (neutral-polite). ¿Podría…? ("Could you…?").
Vocab: entradas (tickets), taquilla (ticket office / ticket window), grada (seating area / stands). "Grada" is typical stadium vocabulary in Spain.
Model: —Buenos días. Querría dos entradas para la grada lateral, por favor.

Price and availability: —¿Cuánto cuestan? —¿Quedan en la grada alta? —¿Podría ver el plano?
Choosing seats: —¿Me las podría dar juntas? —¿Podría ser en la fila 10?
Payment and ticket delivery: —¿Puedo pagar con tarjeta? —¿Me imprime las entradas o son digitales?
Cultural tip: keep a polite tone when talking about sport. "Grada" and "ir al campo" are common stadium-related terms in Spain.