You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Anthony Jackson. I want to book a flight ticket to attend my brother's marriage at Phoenix, AZ- PHX, so I want to fly from DCA.

ASSISTANT: Sure, please let me know your travel dates.

USER: My travelling dates are from 12/26 to 12/28.

ASSISTANT: Please wait a moment, I will check with the availability of the flight.

USER: Ok.

ASSISTANT: We found a connecting flight with price 100, flight number is 1003.

USER: Please go with booking.

ASSISTANT: Your ticket has been confirmed with  UA airlines.

USER: Thank you.

ASSISTANT: Thank you.