You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to change my existing reservation, due to some health issue. Can you please help me out?

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: Sure, my name is Amanda Phillips.

ASSISTANT: Please allow me a minute.

USER: Ok, take your time.

ASSISTANT: Thank you. I am really sorry to inform you that there is no reservation found on your name.

USER: That's ok, thank you for checking.