You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My scheduled examination dates has been postponed, could you please help me with changing my recent reservation?

ASSISTANT: Sure, I will help you with the change of flight reservation. May I know your name please?

USER: My reservation was done under the name Robert Lopez.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no reservation on your name to change it.

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you.