You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I would like to change my reservation due to sudden health issue, can you please help me out with that?

ASSISTANT: May I know your name please?

USER: Thank you for accepting my request, I have reserved it on the name of Helen Garcia.

ASSISTANT: Sorry, there are no reservations found on this name.

USER: Oh! No issues. It might be due to server issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking.