You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: My name is Nicole Johnson and I want to change my recent reservation. Can you please help me ?

ASSISTANT: Sure, I am happy to help you with that. Please wait a moment to check your reservation status.

USER: Ok, take your time.

ASSISTANT: Sorry Nicole Johnson, no reservation has found under your name to change.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.