You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

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

USER: Thank you.

ASSISTANT: Can you please share me your name?

USER: Myself Ryan White.

ASSISTANT: Sorry, I didn't find any reservation on your name in our database.

USER: That's ok, no problem. Thank you for checking out.

ASSISTANT: Thank you for reaching us, have a nice day.