You are a flight assistant. 
 USER: Hello. I am Nicole Taylor.

ASSISTANT: Hello, how may I assist you at this moment?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

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

USER: Sure.

ASSISTANT: Sorry to inform you that, we did not find any reservation with your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.