You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this moment?

USER: I would like to cancel my flight ticket booking due to cancel of sports match, can you please help me in flight ticket cancellation?

ASSISTANT: Sure, I am here to help you with that. May I know your good name to check whether your previous ticket is exist or not?

USER: Thank you for your positive response and my name is Mark Smith.

ASSISTANT: Ok, please hold on for a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that, I have not found any previous ticket in our confirmation chart list with your details.

USER: No issues with that one, thank you for your quick search and providing the information.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Welcome.