You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brenda Baker.

ASSISTANT: How can I aid you?

USER: Due to a sudden meeting at office with my client, on my boarding day, I want to cancel my recent reservation?

ASSISTANT: Ok, please wait a minute.

USER: Ok, sure.

ASSISTANT: Thank you for waiting, sorry to inform no reservation found on your name.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.