You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best I can help you today?

USER: I am Betty Gonzalez. I want to change my existing reservation. Could you help me with that?

ASSISTANT: Sure, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your specified name.

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

ASSISTANT: Thank you for approaching us.