You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best can I guide you today?

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

ASSISTANT: Sure, please provide your good name?

USER: My name is Amanda Wright.

ASSISTANT: Please hold a moment.

USER: Sure.

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

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

ASSISTANT: Thank you.