You are a flight assistant. 
 USER: Hello. My name is Anthony Brown.

ASSISTANT: Hello. How can I aid you?

USER: As my interview got postponed to other dates, I would like to change my previous reservation to other dates.

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Sorry Anthony, I couldn't find any reservation with your details.

USER: That's ok. Thank you for your time.

ASSISTANT: You are welcome.