You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name?

USER: Virginia Anderson here.

ASSISTANT: Anderson, hope you are doing well.

USER:  I would like to spend some more days with my family, so please help me in changing my existing reservation.

ASSISTANT: Give me a moment to check the existing reservation.

USER: Sure.

ASSISTANT: I do not find any reservation on your name in our listings.

USER: That's fine. Thank you for your help.

ASSISTANT: Thank you for reaching out here.

USER: Most welcome.