You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, can I know your name please?

USER: Myself Deborah Nelson.

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

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Thank you for approaching us.