You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: My meeting at Orlando has been postponed, so I would like to change my existing reservation. Could you help with this?

ASSISTANT: Sure, I will help you, wait for a moment please to check your reservation status. May I know your name please?

USER: My previous reservation has done with the name of Raymond Brown.

ASSISTANT: Brown, in my database I did not found any reservation with your name. Anything else to help you.

USER: Ok, not an issue. May be something went wrong while I'm booking.

ASSISTANT: Thank you for reaching us.