You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I want to cancel my recent reservation due to sudden postpone of my document verification. Can you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a moment. May I know your name?

USER: Sure, I am Ruth Robinson.

ASSISTANT: Sorry, no reservation found on name of Ruth Robinson.

USER: Ok no problem.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thank you.