You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to cancel my recent reservation, can you help me in that?

ASSISTANT: Sure, I can help you. Can I know your name for checking your reservation?

USER: Sure, myself Mary Young.

ASSISTANT: Please allow me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation obtained based on my search in our date base.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: You are welcome and thank you for opting us.