You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, please hold on.

USER: Ok.

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

USER: That's ok. Thank you for helping me.

ASSISTANT: Thank you for approaching us.