You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I am William Baker. Can you please help me to cancel my active reservation?

ASSISTANT: Sure, I am gleeful to assist you. Please wait a while.

USER: Ok.

ASSISTANT:  Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.