You are a flight assistant. 
 USER: Hello. I am Brenda Harris.

ASSISTANT: Hello, How can I aid you?

USER: Can you please change my reservation as my holiday trip has been postponed?

ASSISTANT: Sure. Wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: No problem. Thank you.

ASSISTANT: Thanks for choosing us.