You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Amy Hill here.

ASSISTANT: How can I help you today?

USER: I would like to change my recent reservation due to some health issues, can you please help me in that?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok, no problem. Anyway thank you for the information.

ASSISTANT: Thank you for reaching us, have a safe flight.