You are a flight assistant. 
 USER: Hello, I am James Martin.

ASSISTANT: Hello. How can I assist you James Martin?

USER: As the convocation day in my college got postponed, I want to change my existing reservation.

ASSISTANT: Sure, give me a minute I will check the status and revert you.

USER: Ok.

ASSISTANT: Thank for waiting, unfortunately there is no reservation found on your name. Thank you for serving you, have a nice day.

USER: Ok, thanks for the information.