You are a flight assistant. 
 USER: Hi. I am Nicole Evans.

ASSISTANT: Hello. How can I aid you today?

USER: I need to change my existing reservation, Can you please help me with that?

ASSISTANT: Sure, I am here to help you, please wait for a while.

USER: Sure.

ASSISTANT: Sorry Nicole Evans, no reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your information.