You are a flight assistant. 
 USER: Hello. I am Christopher White.

ASSISTANT: Hello, how can I assist you now?

USER: Owing to an emergency, I need to cancel my existing reservation. Can you help me with that?

ASSISTANT: Sure, I will help you with cancellation.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: It's ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day ahead.