You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Samantha Miller.

ASSISTANT: How can I aid you today?

USER: Unfortunately, Our event has been postponed. So I want to make changes in my recent reservation.

ASSISTANT: Sure. I will aid you with that. Please wait a moment, I will check your previous reservation status.

USER: Take your own time.

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

USER: That's fine, thank you for checking.

ASSISTANT: Thank you for reaching us.