You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Myself Andrew Walker. Actually I have done my reservation with your agency for the client meet. But all of sudden meeting location got changed to LAX. Can you please me to modify reservation?

ASSISTANT: Sure, I will help you.

USER: Thanks for your positive response.

ASSISTANT: Please wait a while.

USER: Sure, take your time.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: It's ok, it might not be done properly at the time of booking. Anyway thank you for checking my reservation.

ASSISTANT: Thank you for opting us.