Dialogue 1 matches picture B.
Dialogue 2 matches picture C.
Dialogue 3 matches picture A.
Dialogue 1:
A: Good morning, Paul!
B: Hello, Jane!
A: How are you?
B: I'm fine, thanks. And you?
A: Not bad. See you later!
B: OK. Goodbye!
Dialogue 2:
A: It's getting late. Good night, Sasha!
B: Good night, Peter. See you tomorrow!
Dialogue 3:
A: Goodbye, mum!
B: Goodbye, Liz. See you later.
A: See you.