You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Green. I am planning to visit New York to meet my father, can you please find a flight from Washington?

ASSISTANT: Sure, can you provide me the departure and landing airport codes?

USER: Sure, my travelling airport codes are DCA to JFK.

ASSISTANT: provide me with your itinerary dates.

USER: Sure, I am planning to start my journey on Nov 13 and return back om Nov 15.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Southwest airlines is providing service on your route with single connection.

USER: Please proceed.

ASSISTANT: Your ticket is booked in the economy class with cost 100.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.