You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I support you?

USER: My plan to visit my family meeting which has been postponed, so I want to cancel my ticket.

ASSISTANT: Sure, we are glad to help you. May I know your good name please?

USER: My name is Anthony Edwards.

ASSISTANT: OK, Anthony Edwards, please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for your patience. Sorry, we did not find any reservation specified on your name.

USER: Thanks for the information.

ASSISTANT: Thanks for contacting us. Have a nice day.