You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Virginia Harris.

ASSISTANT: Harris, how can I help you today?

USER: My scheduled examination dates has been postponed. So, I would like to change my existing reservation.

ASSISTANT: Ok. Wait for a moment to check your reservation status.

USER: Ok.

ASSISTANT: Sorry Harris, I did not find any reservation with your name.

USER: That's ok.

ASSISTANT: Anything else to help you.

USER: No, thank you for the information.

ASSISTANT: It's my pleasure Virginia Harris, have a nice day.