You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you aid me to amend my reservation due to emergency?

ASSISTANT: Sure, I am here to help you. May I know your good name to proceed further?

USER: Daniel King here.

ASSISTANT: Sorry, there is no active reservation on your name in our data.

USER: Thank you for checking.

ASSISTANT: Thank you for choosing us.