You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for 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 changing my reservation?

ASSISTANT: Sure, let me know your name to check for your reservation status?

USER: Cynthia Harris here.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name in our portal to change it.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for contacting us.