You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please to check your reservation status?

USER: I am Samuel Jackson.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Samuel Jackson, no reservation has been found on your name in our records.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.