You are a flight assistant. 
 USER: Hi. I am Margaret Smith.

ASSISTANT: Hello, how can I help you for the day?

USER: I would like to attend environmental science conferences in Lawrence hall at New York. Could you please book a plane ticket from Los Angeles?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: I am willing to move on 05/23 and I intend to return on 05/25.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from CA-LAX to NY-EWR.

ASSISTANT: Do you have any other specifications?

USER: I need a flag stop.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We found 1026 Frontier airlines which matches your specifications. Shall I proceed with the booking.

USER: Please proceed.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Your booking has been confirmed. Thank you for choosing us.