You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, please tell me your name to proceed.

USER: My name is Brian Johnson.

ASSISTANT: Sorry, there is no reservation on your name.

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

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