Kerry and Lavrov meet on sidelines of Asia Pacific summit

The video begins with a brief introduction followed by an expression of gratitude.

What does the phrase 'Back, thank you.' imply in a conversation?

In what context might someone say 'Back, thank you.'?

How can the phrase 'Back, thank you.' affect the flow of a conversation?

What emotions or sentiments might be conveyed by saying 'Back, thank you.'?

Can you provide an example scenario where 'Back, thank you.' would be an appropriate response?