You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please change my recent reservation details? As my planned trip has been postponed.

ASSISTANT: Sure, please share me your good name.

USER: Sure, my name is Rebecca Roberts.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there is no active reservation found on your good name.

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

ASSISTANT: Thank you for opting us.