You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Stephen Mitchell. As my father's health condition is serious, I want to cancel my resent reservation.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Thanks for giving your time. There was no reservation found on your name.

USER: Its ok, thank you for your information.

ASSISTANT: Thanks for opting us.