You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid 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 good name please?

USER: Sure, my name is Brian Robinson.

ASSISTANT: Please wait a minute.

USER: Sure, I'll wait for your response.

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

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

ASSISTANT: Thank you for opting us.