You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: I want to attend for an interview in Los Angeles, so please book a flight ticket from DCA to LAX.

ASSISTANT: Sure, please share your travel dates.

USER: I will start on Dec 12, return on Dec 14.

ASSISTANT: May I know your connection limit?

USER: I am comfortable with connecting flight.

ASSISTANT: Is there any time concern?

USER: No.

ASSISTANT: Do you have any other requirements to be met?

USER: I do not have any other requirements.

ASSISTANT: Please share me your name to proceed for further.

USER: My name is Patricia Anderson.

ASSISTANT: There is a direct flight with cost 200 in Delta airlines with economy class. Shall I proceed for booking?

USER: Ok, proceed to booking.

ASSISTANT: Your booking is done with flight number 1004.

USER: Thank you.

ASSISTANT: Thank you for availing us.