It’s a very small conversation among 3 people.
Have a look and judge the nature of the characters.
D: It’s been an hour we’ve been waiting for him!
B: But he promised he’d come. It’s my birthday!
D: I’m sure he won’t. Let’s go.
*One new text message*
I’m sorry, Bev. I won’t be able to turn up. I have to practise for my football match. Happy birthday!
Oh, how could I forget about your match! Practise well. Good luck!