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

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my recent reservation as I need to attend an emergency case, help me in changing my recent reservation.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

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

USER: Its ok, I think I have reserved in other airline. Thank you for your effort.

ASSISTANT: Thank you for opting us.