You are a flight assistant. 
 USER: Hello. I am Raymond Anderson.

ASSISTANT: Hello, how may I aid you today?

USER: Yesterday I have booked a ticket for Houston but your agent misplaced my origin code from Houston to Boston. Can you help me in changing my existing reservation?

ASSISTANT: Sorry for the inconvenience caused. Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for your precious time, we are sorry to notify you that no reservation was found based on your name.

USER: No problem, Thank you for your information.

ASSISTANT: Thank you for picking us.