You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you for the day?

USER: I want to book a flight ticket to Oakland, OAK to attend a science fair event.

ASSISTANT: What is your origin airport code?

USER: My source point is Los Angeles, LAX.

ASSISTANT: May I know your planned dates for the following journey?

USER: My travelling dates are from 10/30 to 11/01.

ASSISTANT: May I know your name to proceed with further process?

USER: I am Barbara Scott.

ASSISTANT: Sorry to inform you Barbara Scott, there are no flights currently available for your journey.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for helping me.