You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: Myself Virginia Jones. I need a help from you in changing my existing reservation?

ASSISTANT: I am glad to help you about your flight ticket modification.

USER: Thank you for your positive response.

ASSISTANT: Sorry to say this Jones, I am not able to find any of the reservations under your name to change.

USER: It's ok , no problem. Thank you for the information.

ASSISTANT: Most welcome, thank you for reaching out here.