You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: I am Joseph Davis. I need to change my reservation due to my planned event got postponed. So please help me with that.

ASSISTANT: I am here to help you in changing your flight ticket reservation.

USER: Thank you.

ASSISTANT: Sorry to say this Davis, there are no active reservations under your name.

USER: Oh! It may not be booked properly due to server issues. Anyway, thank you for your time.

ASSISTANT: You are welcome, thank you for reaching out here. Hope you have a good day ahead.