You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Yes, I can help you with that. Can I know your name for checking your previous reservation?

USER: My reservation was done done under the name Donna Martin.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: That's ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for the information.