You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there anything specific that you would like me to help you with?

USER: Yes, I just want to cancel my recently done reservation, because of cancellation of my trip. Can you please help me in this?

ASSISTANT: Sure, I am happy to help you. Give me a second.

USER: Sure, I'm Catherine Davis here.

ASSISTANT: I am sorry to inform that there is no reservation found on your name.

USER: No problem.

ASSISTANT: Thank you for providing me with your details.

USER: You are welcome. Thank you.