You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nancy King here.

ASSISTANT: King, how can I assist you?

USER: I want to cancel my ticket due to financial problems.

ASSISTANT: Sure, I can do that for you. Please wait, let me check your reservation status.

USER: Ok.

ASSISTANT: Sorry King, I did not find any reservation under your name is our database.

USER: No problem, thank you.

ASSISTANT: You are welcome and thank you for contacting us.