You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Myself William Jackson. Due to some client meeting, I am going to cancel my reservation. Can you please help me for this?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you. Sorry William Jackson, there is no reservation on your name in our database.

USER: Not a big deal, anyway thank you very much for your kind response.