You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I support you today?

USER: Can you help me in changing my recent reservation, as my exam is postponed?

ASSISTANT: Sure, I'll try to help you in changing an existing reservation.

USER: Ok.

ASSISTANT: Can I have your name please to check the reservation status?

USER: I am Jennifer Jackson.

ASSISTANT: Thank you for providing your name, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, Sorry there is no active reservation have been found under your name in our database to change it.

USER: No issue, thank you.

ASSISTANT: Thank you for approaching us.