You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you aid me in booking a flight ticket from DCA to LAX?

ASSISTANT: May I know your travel dates?

USER: Sure, I would like to go on Jan 20th and return back on Jan 22nd.

ASSISTANT: Do you have any preferences?

USER: Ensure it is a direct flight.

ASSISTANT: Do you have any other preferences?

USER: No, I don't have any other specifications.

ASSISTANT: Flight-1011 is available in UA airlines with direct flight and the ticket fate is 200. Can I proceed?

USER: Ok, please proceed for further with my name Timothy Carter.

ASSISTANT: Your booking is confirmed.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.