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 will help you with that. Can I know your name please?

USER: My reservation was done under the name Brian Hill.

ASSISTANT: Sure, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found basis on your details.

USER: That's ok, no issues. Anyways, thank you for the information.

ASSISTANT: Most welcome.