You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent reservation due to postpone of my event. Could you please help me?

ASSISTANT: Sure, I am willing to help you for this. May I know your name please?

USER: I am Joshua Anderson.

ASSISTANT: Please wait for couple of minutes.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no reservation is found under your name to cancel.

USER: No worries, thank you for the information.

ASSISTANT: Thank you very much for approaching our agency.