You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us, have a nice day.