You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Stephen Martin here. I have planned to visit my cousin, but there is a meeting in my office on  that  date. Can you please help me in cancel my recent reservation?

ASSISTANT: Sure, please hold on.

USER: Ok, take your time.

ASSISTANT: Sorry, no reservation found on given name.

USER: Ok, It may be cancelled by my manager, but he didn't informe me. Anyway, thank you for searching.

ASSISTANT: Thank you for reaching us.