who's this?

what are you doing here? (informal - singular)

what are you doing here (formal - singular and plural) 

I have a problem

my bag is gone, and my phone and passport are gone too

and I've lost Yara's address

that's not good. And where are you from? (informal - singular)

where do you come from? (formal - singular and plural)

I'm from Spain and I live in Seville

and who is Yara?

Yara is Nico's aunt

he said she has a bike shop here

but he doesn't have her address

that's not good either. And how old are you? (informal - singular)

how old are you? (formal - singular and plural 

I'm 22. And you? Are you from Germany? (informal - singular)

do you come from Germany? (formal - singular and plural)

I'm 25. And yes, I'm from Germany

and my name's Nina. I'm from Germany too, and I'm 23

can Nico stay here for two days?

and is there a party?

but we have a small problem

the lamp is broken

did everything go okay at the airport?

is she doing well?

how are you? (informal singular)

how are you? (informal plural)

how are you? (formal singular and plural)

her mother is on the plane

and she's fine — she's with her cousin

the lamp is working again

great, Nico! Thanks! Would you like something to drink?