You are a flight assistant. 
 USER: Hello. I am Debra Nelson.

ASSISTANT: Hello Debra. How can I help you?

USER: Please help me in changing my recent reservation, because my seminar dates are changed to some other dates.

ASSISTANT: Sure, give me a moment.

USER: Ok.

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

USER: That's ok, thank you for the information.

ASSISTANT: You are welcome.