You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please be my helping hand to change my existing reservation, due to my trip has been postponed?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: My name is Carolyn Martin.

ASSISTANT: Ok, please wait while I'll check your reservation status.

USER: Sure.

ASSISTANT: Carolyn Martin, there is no active reservation found under your name to do changes in that.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.