You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, please let me know how can I be a help for you?

USER: This is Virginia Carter. I just want to change my existing reservation can you please out with that?

ASSISTANT: Sure, hope you are doing well Virginia. Sorry for the inconvenience, no reservation found for you.

USER: OK. Thank you for the information.

ASSISTANT: Thank you.Have a great day.