You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Anna Allen here. I would like to change my reservation, can you please help me out with that?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

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

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for approaching us.