Ответ:

Situation 1.

-hey, Chuck, the concert starts in an hour, why don't you come? I'm already at the entrance.

- Sally, I think ... I forgot to buy tickets ... Could you see if there are a couple of tickets left at the box office?

- Chuck! How could you forget about the most important thing?

-sorry.

-Tickets are sold out.

-We can ask to sell us tickets, look for people with tickets!

-OK.

Situation 2.

- Hi Sam. What did you buy me?

-Hi Lucy, here, see for yourself.

-Sam! This is not what I wanted!

-Sorry, I don't know all your interests yet, we are friends not so long ago.

- Next time, ask about my interests, okay?

-OK.