Dos billetes para Valencia, por favor Two tickets to Valencia, please

Near future: ir a + infinitive. Vamos a viajar mañana means "we're going to travel tomorrow": vamos (the nosotros form of ir) + a + the infinitive. Use it for what you're going to do, just like English "be going to".

Tickets: para, de ida y vuelta. Dos billetes para Valencia means "two tickets to Valencia": para shows where the ticket takes you. De ida y vuelta means "round-trip", literally "of going and coming back".

El tren de las nueve. "The nine o'clock train": the departure time is joined to the train with de. When it arrives, use a: llega a las once y media (it arrives at eleven thirty).

Why? Because. The question is two words with an accent: ¿Por qué…? The answer is one word with no accent: porque. ¿Y por qué el autobús es más barato? (And why is the bus cheaper?) Porque es lento y hace muchas paradas. (Because it's slow and makes a lot of stops.) Más barato means "cheaper".

Tener prisa, tener que. Tener can describe a state: nosotros tenemos prisa is literally "we have hurry", that is, "we're in a hurry". Tener que + infinitive means "to have to": ¿A qué hora tenemos que estar en la estación? (What time do we have to be at the station?)

Antes de la salida. Veinte minutos antes de la salida means "twenty minutes before departure": antes de is "before", and the word order is the same as in English.

Gustar with a. In A Ana no le gusta esperar (Ana doesn't like waiting), the thing liked is an action (esperar), and the person comes with a and the pronoun le. ¡Y a ti tampoco, Pablo! means "and neither do you, Pablo!", literally "and to you not either".