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 changing my reservation?

ASSISTANT: Sure, may I know your name?

USER: Emma Young.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there are no active reservations on your given name to change.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for reaching us.