You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to change my existing reservation, due to some health issue. Can you please help me out?

ASSISTANT: Ok, please can I know your name to check the reservation records?

USER: Sure, my name is Jason Scott.

ASSISTANT: Please hold on for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found by your name to amend it. Thank you for choosing our agency.