You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to travel from IAD to LAX. Can you help me to book a flight ticket?

ASSISTANT: Sure, can you share your journey dates?

USER: I want to fly in the flight on June 11 and June 13.

ASSISTANT: Do you have any preferences?

USER: I am looking for a direct flight.

ASSISTANT: May I know your name?

USER: Nancy Turner.

ASSISTANT: There is a direct flight with number 1006 in airline Spirit, the fare is 100 in economy class. Can I book it?

USER: Proceed to booking.

ASSISTANT: Your ticket is reserved, the depart time is 0:00 AM and return time is 1:00 AM.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.