You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you aid me to change it?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Samantha Edwards.

ASSISTANT: Sorry, there is no reservation found on your name.

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

ASSISTANT: Thank you for choosing us.