You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning. What kind of help are you expecting from my side?

USER: As my business trip got postponed to other dates, I would like to change my existing reservation.

ASSISTANT: Sure, please hold on for a moment, let me check. Can I know your name?

USER: My name is Jennifer Allen.

ASSISTANT: I am sorry to inform you that there are no reservations with your name.

USER: No problem, I will find other means of transport to reach my destination.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your time.