You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Laura King.

ASSISTANT: How can I assist you at this moment?

USER: Due to sudden changes, my exams has been postponed. Can you please change my reservation?

ASSISTANT: Sure Laura King, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Ok.

ASSISTANT: Sorry Laura King, no reservation has found under your name to change.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us, have a good day.