You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, 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.

USER: Can you help me with cancellation?

ASSISTANT: Sure.

USER: Thanks for your response.

ASSISTANT: May I know your name to check reservation?

USER: Sure, Gregory Hall is my name.

ASSISTANT: Please, wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, there is no reservation available with your name.

USER: Ok, I think it was not reserved properly. Anyway, thanks for being with me.

ASSISTANT: Thank you for approaching us.