You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I aid you?

USER: I am Rachel Rodriguez. I want to change an existing reservation.

ASSISTANT: Wait for a moment, I will check and get back to you. Thanks for waiting, No reservation found on your name.

USER: OK, not an issue.

ASSISTANT: Thank you for choosing us, Have a great day.

USER: Thank you.