You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: Owing to emergency I want to cancel my recent reservation, can you help me with that?

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

USER: I am Charles Carter.

ASSISTANT: Sorry, we did not find any active reservation on your name in our data.

USER: No problem, thank you for the checking.

ASSISTANT: Thank you for availing us.