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

ASSISTANT: Hello Elizabeth Evans. What can I do for you?

USER: I want to reschedule my existing reservation as my interview got postponed. Can you help me out with it?

ASSISTANT: Sure, wait a while. I will check the status and revert you.

USER: Ok.

ASSISTANT: Sorry to say this, there are no reservation found on your name. Thanks for availing our service.

USER: Ok, thanks for the response.