You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I would like to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, I will help me in that.

USER: Thank you for considering my request.

ASSISTANT: Before proceeding may I know your name please?

USER: Sure, myself Mary Adams.

ASSISTANT: Sorry, based on your name we haven't found any previous reservations.

USER: Not an issue with this one, anyway thank you for the information.

ASSISTANT: Thanks for reaching us.