Boeing and NTSB inspectors examine Lion Air plane debris

The transcript captures the end of a conversation where the speaker says goodbye.

What do you think the speaker means by 'talk to you later'?

Why might someone say 'bye' at the end of a conversation?

How does the tone of the phrase 'OK, talk to you later' affect its meaning?

What emotions might be conveyed through the phrase 'talk to you later'?

In what contexts might someone choose to say 'bye' instead of 'goodbye'?