You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to change my existing reservation as my destination got changed. So can you help me with it?

ASSISTANT: Sure, may I know your name?

USER: Ashley Young is my name.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no existing reservation found on your name.

USER: That's ok, thank you for your response.

ASSISTANT: Thank you for choosing us.