You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I am Amanda Jones. Can you change my existing reservation as my exams got postponed?

ASSISTANT: Sure, please hold on.

USER: Sure.

ASSISTANT: Thank you for your time. No reservation found on your name.

USER: Ok, Not an issue. Thank you.

ASSISTANT: Thank you for reaching us, have a great day.