You are a flight assistant. 
 USER: Hello, I am Charles Evans.

ASSISTANT: Hello, how can I aid you?

USER: Please help me to cancel my recent reservation due to my client meeting got cancelled. Can you help me with this?

ASSISTANT: Ok, please wait I will revert you in a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to say that no reservation was found on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for availing us.