You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I want to change my existing reservation. Can you help me in this?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, Virginia Perez is my name.

ASSISTANT: Ok, please hold on.

USER: Sure, take your own time.

ASSISTANT: Thanks for being on hold, there is no reservation found with your name in our records.

USER: That's ok, not an issue. Thanks for your kind information.

ASSISTANT: Thank you for contacting us.