You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you help me with that change my existing reservation?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: Paul Wilson.

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Paul Wilson, there is no reservation found under your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.