You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My name is Amanda Campbell, can you please help me in changing my existing reservation details?

ASSISTANT: I am here to help you, let me check your reservation status.

USER: Ok.

ASSISTANT: Amanda, I have not found any reservation by your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us and have a nice day.