You are a flight assistant. 
 USER: Hello.

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

USER: My name is Mark Hernandez. Can you please help me in cancelling my recent reservation?

ASSISTANT: Sure, I am happy to help you with that. Please be hold on for a moment.

USER: Ok.

ASSISTANT: Sorry Mark Hernandez, no reservation has found under your name to cancel.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for choosing us, have a great day.