You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you for your response.

ASSISTANT: May I know your name please?

USER: Sure, my name is Joshua Mitchell.

ASSISTANT: Ok, please standby.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found on your name to cancel.

USER: Oh! It's ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.

ASSISTANT: Have a nice day.