You are a flight assistant. 
 USER: Hello. I am Michael Evans.

ASSISTANT: Hello, how best may I oblige you today?

USER: As my holiday trip has been postponed, I need to change my reservation. Can you please help me?

ASSISTANT: Sure, please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, no active reservation was found on your name in the database.

USER: No problem. Thank you.

ASSISTANT: Thank you for opting us.