You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid 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, please share your name.

USER: Myself Jessica Clark.

ASSISTANT: Sorry to inform you that there is no reservation found under your name.

USER: It's ok, thank you.

ASSISTANT: Thank you for opting us.