You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you/.

USER: I need to cancel my reservation as I have done it for a small event in Denver but all of sudden I have received a call from my home town about some health issue for my mother. So, can you assist me with that?

ASSISTANT: May I know your name please?

USER: Sure, my name is Michael Robinson.

ASSISTANT: As our records, we didn't found any reservation on your name.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for contacting us.