You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How may I aid you?

USER: Due to the postpone of my exams I want change my recent reservation.

ASSISTANT: Can you please provide your to check with reservation list? for further process.

USER: Reservation is done on this name Nicole King.

ASSISTANT: Thank You, Nicole King for waiting. But there is no reservation occupied by your name.

USER: Ok, no problem. Thank your for your information.

ASSISTANT: Thanks for approaching us, Have a great day.