You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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 with your concern. May I know your name please?

USER: Thank you for your response. Sure, my name is Carol Harris.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Carol Harris, no reservation has been found on your name in our database.

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

ASSISTANT: Thank you for choosing us.