You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you at this moment?

USER: I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, may I know your good name?

USER: My name is David Parker.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.