You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Please provide your name to check your reservation.

USER: I am George King.

ASSISTANT: Sorry to say, there is no reservation found on your name.

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

ASSISTANT: Thanks for choosing us, have a good day.