You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am looking for changing my reservation due to health issue, can  you please help me out with that?

ASSISTANT: Sure, May I know your name?

USER: Ok, I have reserved it on the name of Rebecca Thompson.

ASSISTANT: Ok, wait for some time.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Thanks for approaching us.