You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best can I aid you for the day?

USER: I want to change an existing reservation, so please help me in changing the reservation.

ASSISTANT: Sure, can I know your good name?

USER: Myself Angela Lopez.

ASSISTANT: Please hold a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no active reservation found with the given name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.