You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me in booking a flight ticket to DCA from LAS?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Anthony Carter.

ASSISTANT: Please share me your airport codes.

USER: Already mentioned.

ASSISTANT: Can I know your travelling dates?

USER: My travel dates are from Oct 14 to Oct 16.

ASSISTANT: Is there any other specifications?

USER: I need a connecting flight.

ASSISTANT: We found a connecting flight with an Delta airlines, flight number:1021.

USER: You can proceed with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you.