You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I amend you for the day?

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

ASSISTANT: Sure, will you clarify me weather to cancel or change the reservation?

USER: Sure, I would like to change my recent reservation.

ASSISTANT: May I have your name please?

USER: Sure, you can check the reservation on the name of Christine Edwards.

ASSISTANT: Ok, give me a minute.

USER: Sure.

ASSISTANT: Sorry, no reservation found on the name Christine Edwards.

USER: Ok, no issue. Thanks for your help.

ASSISTANT: Thank you, have a nice day.