You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Amy Edwards.

ASSISTANT: How may I support you today?

USER: I need to change my existing reservation due to postpone of my shareholder's meeting so, can you help me in changing my reservation?

ASSISTANT: Sure, I'll help you in change an existing reservation.

USER: Thank you.

ASSISTANT: Please wait a moment I will check the reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not found any reservation on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.