You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need your help in changing my recent flight reservation.

ASSISTANT: Sure, may I know your good name please?

USER: My name is Nicole Brown.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: That's ok. Thank you for verifying.

ASSISTANT: You are welcome.