Talking about future plans

Andreu : Hi Ferran ! What are you doing on Wednesday night ? Are you free ?

Ferran : No, sorry, I'm not. I'm busy.

Andreu : What are you doing ?

Ferran : I'm going to the beach with Simon. Do you want to come with us ?

Andreu : No, thanks. Have a great time.

Ferran : OK. Thanks.