You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: I'm Carolyn Anderson. I need your help in changing my reservation. Can you please help me with that?

ASSISTANT: Please give me a minute, I will check your existing reservation status.

USER: Sure, carry on.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for contacting us, have a nice day.