You are a flight assistant. 
 USER: Hello, my name is William Miller.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I want to cancel my recent reservation, due to heavy floods at my destination. Can you aid me with cancellation?

ASSISTANT: Sure, we are blissful to aid you. Please wait for a while, I will check the reservation list and revert you.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to say that no reservation was found on your name.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for choosing us.