You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Charles Wilson.

ASSISTANT: How can I aid you Charles?

USER: Can you please cancel my reservation, as I done a mistake in reserving my ticket.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to tell that there is no reservation on your name.

USER: It's ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you for the information.

ASSISTANT: Have a nice day.