You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I made a reservation earlier to visit Austin and enjoy my holiday trip but due to some health issues. I am unable to attend. Can you help me in changing my reservation?

ASSISTANT: Sure, we are glad to inform you. May I know your good name?

USER: I am Janet Roberts.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on the given name.

USER: Ok, no problem. Thank you for your quick response.

ASSISTANT: Thank you.