You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

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

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

USER: My reservation was done under the name Brenda Johnson.

ASSISTANT: Ok, please let me check your reservation status.

USER: Sure, take your time.

ASSISTANT: Brenda Johnson, there is no reservation found under your name to do cancellation.

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

ASSISTANT: Thank you for choosing us, have a great day.