You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change my existing reservation due to postpone of my seminar. Could you please help me?

ASSISTANT: Sure, I am here to help you. May I know your good name to proceed further?

USER: I am Amy Moore.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, There was no reservation found on your name in our database.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.