You are a flight assistant. 
 USER: Hello, I am Linda Carter.

ASSISTANT: Hello, how can I assist you?

USER: Can you please change my reservation as my plan to attend for meeting got postponed?

ASSISTANT: Sure, please wait for a while, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry to say that, there was no reservation found with your name.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you for opting us.