You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can aid you today?

USER: Please change my active reservation as my meeting was postponed.

ASSISTANT: Sure, I will help you with that. Could you please mention your name for further process?

USER: Myself Carol Nelson.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

ASSISTANT: There is no previous reservation available under your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.