You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My planned trip got cancelled unexpectedly, so I need to cancel my ticket. Can you please help me?

ASSISTANT: May I know your name please?

USER: My name is Deborah Hill.

ASSISTANT: Sorry, there is no reservation found basis on your details.

USER: It's ok, anyways thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.