You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My plan to visit a function got postponed, will you help me in changing my existing reservation?

ASSISTANT: Sure, May I know your good name please?

USER: Nichole Hall is my name.

ASSISTANT: There is no existing reservation found on your name.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for approaching us.