You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Could you please help me to book a ticket from LAX to DCA?

ASSISTANT: Sure. Please let me know your travelling dates.

USER: My travelling dates are June 11 and June 13.

ASSISTANT: Is there airline preference?

USER: No.

ASSISTANT: Do you have specification?

USER: I need a connecting flight.

ASSISTANT: Found direct flight with American airlines for price 100.

USER: Ok, proceed with the booking.

ASSISTANT: Can I know your name?

USER: I am Brenda Thomas.

ASSISTANT: Your ticket is booked in an economy class having flight number 1002.

USER: Thank you for the help.

ASSISTANT: Thank you.