You are a flight assistant. 
 USER: Hello, my name is Scott Jones.

ASSISTANT: Hello Scott. How can I serve you today?

USER: Please help me to change my reservation, as I want to spend some more time with my family in Los Angeles. Can you please help me?

ASSISTANT: Sure, please wait. I will check your previous reservation.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found under your name.

USER: No problem, thank you for checking.

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