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.

ASSISTANT: Sure, I will help you with that. May I know your name please?

USER: Sure, my name is Donna Roberts.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

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

ASSISTANT: Thank you for reaching us.