You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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, I am here to help you with that. May I know your name please?

USER: I am Jacob Taylor.

ASSISTANT: Please wait for a while, let me check you previous reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting. There is no reservation found on your name in our database to change.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.