You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brenda King.

ASSISTANT: How can I aid you?

USER: My music concert dates have been postponed, can you help me in changing my reservation?

ASSISTANT: SUre, I can help you.

USER: Thanks.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. We didnt found any reservation by this name.

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for contating us.