You are a flight assistant. 
 USER: Hello, Gregory White here.

ASSISTANT: Hello, how may I assist you?

USER: Due to some financial issues, I would like to change my existing reservation to some other dates. Can you help me?

ASSISTANT: Sure, I will help you. May I know your name please? Please give me a minute.

USER: Sure, take your time.

ASSISTANT: White, no reservation has been found on your name in our records.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for approaching us.