You are a flight assistant. 
 USER: Hi. Eric Turner here.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to visit Washington to visit white house, as I have to attend a dinner party with the President. Can you book a flight ticket?

ASSISTANT: Sure, can you please share your travel dates?

USER: My preferable dates for travel are 10/13 to 10/15.

ASSISTANT: Could you please help me with the airport codes?

USER: My airport codes for boarding the flight are IAD to DCA. I need a connecting flight.

ASSISTANT: Let me check for the availability of flight.

USER: Sure.

ASSISTANT: Eric, there is a flight available with price 900 and the connection is 1 with Southwest airlines. Would you like me to proceed with the booking?

USER: I am ok with the airlines. You can book it.

ASSISTANT: Your booking is confirmed with 1027 flight number.

USER: Thank you.

ASSISTANT: Thank you for contacting us.