You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I support you today?

USER: Actually, I made a earlier reservation to go for a trip with my friends, but heavy work load in office. I want to change my reservation. Can you please help me?

ASSISTANT: Sure, I'll help you in changing an existing reservation.

USER: Thank you.

ASSISTANT: May I know your name to check the reservation status?

USER: Myself Sharon Lopez.

ASSISTANT: Ok, please give me some time.

USER: Ok.

ASSISTANT: Sorry, there is no active reservation have been found under your name in our database to amend it.

USER: That's fine. Anyway, thank you for checking.

ASSISTANT: Thank you for availing us.