You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your name for the changing process?

USER: My reservation was done under the name Alexander Martinez.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry as per your concern I can not amend your reservation, as your reservation is not found as per our records.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Welcome, thank you for reaching us.