You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you now?

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, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Rebecca Harris here.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data to change it.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for visiting us, we hope see you again.