You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Cynthia Lewis.

ASSISTANT: Sorry, there is no reservation on your name.

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

ASSISTANT: Thank you.