You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I want to cancel my ticket due to some personal problems, can you please help me to cancel my reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name to check your reservation status?

USER: My name is Donna Lee.

ASSISTANT: Ok, please give me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name in our records to cancel.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.