You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight ticket from IAD to SFO. Can you please help me in that?

ASSISTANT: Yes, can you share me your travelling dates?

USER: My trip dates are Sept 06 to Sept 08.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight.

ASSISTANT: I have found an economy class ticket with a price of 200 and it is a direct flight.

USER: It is perfect for me. You can proceed for booking.

ASSISTANT: Can I know your name for booking?

USER: Myself Anthony Adams.

ASSISTANT: Your ticket is booked.

USER: Thank you for booking.

ASSISTANT: Welcome.