You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I assist you?

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

ASSISTANT: Sure, we are here to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there is no seat reserved for you in any flight.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.