You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: Sure, I will help you with your request.

USER: Thank you.

ASSISTANT: Can I know your name to check your previous reservation?

USER: Sure, my name is Richard Davis.

ASSISTANT: Please be on hold to check.

USER: Ok.

ASSISTANT: Sorry Richard Davis, I got a result by filling our reservation cancelling panel with your name in our portal that is " No reservation Found for this user".

USER: Oh! It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a great day.