You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Christine Lewis. I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you help me in changing?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no flight reservation found with your name.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for opting us.