You are a flight assistant. 
 USER: Hello, I am Emily Lee.

ASSISTANT: Hello, How can I serve you?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Could you please help me with changing my reservation?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name. Thank you for opting us.

USER: Not a problem, thank you.