You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Stephanie Evans here. I would like to change me existing reservation, can you please help me with that?

ASSISTANT: Ok, please be on hold for some time.

USER: Sure.

ASSISTANT: Thanks for your time, there is no reservation found in our database with your name.

USER: That's ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thanks for reaching us.