You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: We planned for going out for a tour with my friends, but has been postponed. Can you please help me in changing my reservation?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Cynthia Moore.

ASSISTANT: Wait a moment please.

USER: Ok, sure.

ASSISTANT: Cynthia Moore, we haven't found any reservation under your name in our database.

USER: Ok, no problem. Anyways, thank you.

ASSISTANT: Thank you for choosing us.