You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to cancel my previous flight ticket booking due to some health issues, can you please assist me with cancellation process?

ASSISTANT: Ok, please can I know your name to proceed further?

USER: Thank you for accepting my request and my name is Mark White.

ASSISTANT: Ok, please wait a moment I will check.

USER: Sure, I can wait.

ASSISTANT: Ok, thank you for waiting. Sorry as per the flight reservation records there is no reservation been found on your name to cancel.

USER: It's alright, I think it might be cancelled by my brother. Thank you for your search and providing the information.

ASSISTANT: My pleasure, thank you for choosing our agency.

USER: Welcome.