You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: My business trip has been postponed.Can you please help me for cancelling the recent reservation?

ASSISTANT: Sure, I will help you with cancelling your ticket.

USER: Ok.

ASSISTANT: But your name is required to cancel ticket. So can you please provide your good name please?

USER: Sure, my name is David Green.

ASSISTANT: Thank you David, please be hold on for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry David, there is no reservation found with your name to cancel.

USER: Ok, It's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.

ASSISTANT: Your welcome. Have a good day.