You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Betty Walker here.

ASSISTANT: How can I help you?

USER: Due to an emergency, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, just a moment please.

USER: Ok, I will wait.

ASSISTANT: I am sorry no reservation found on your name.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for choosing us.