You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I would like to attend seminar at New York, please help me in booking a ticket from LAX to JFK.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travel dates please?

USER: My planned travel dates are on Dec 26 and Dec 28.

ASSISTANT: Ok, do you have any specifications?

USER: I would like to return in the afternoon.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: I need a direct flight for my trip.

ASSISTANT: May I know your name please?

USER: My name is Emma Garcia.

ASSISTANT: Sorry Emma Garcia, there are no flights available on your requested dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.