You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please change my recent reservation? As my planned trip has been postponed to some other dates.

ASSISTANT: Sure, we are glad to help you. Can I have your good name to proceed further?

USER: Sure, my name is David Moore.

ASSISTANT: Sorry, we did not find any active reservation on your name in our data.

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for availing us.