You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, please wait a minute.

USER: Sure, take your time.

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

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

ASSISTANT: Most welcome.