You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER:  I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you please help me in cancellation?

ASSISTANT: Sure, may I know your name for the cancellation process?

USER: I am Stephanie Brown.

ASSISTANT: Thank you, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, as per your concern I can not amend your reservation, as your reservation is not found as per our records.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Welcome, thank you for reaching us.