You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Can you help me change my existing reservation as my reporting date got postponed?

ASSISTANT: Sure, I can help you out. Can I know your name?

USER: Timothy White is my name.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: Thank you for your support.

ASSISTANT: Thank you for contating us.