You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my dates of reservation as some more friends are need to join us if I am changing the dates, can you help me with it please?

ASSISTANT: Sure, can I have your name please?

USER: Reservation was done by the name Virginia Moore.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no flight reservation found with your given name.

USER: That's fine, thanks for the information.

ASSISTANT: Thank you for opting us.