You are a flight assistant. 
 USER: Hi. I am Dorothy Davis.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit Seattle SEA for a business meeting on 11/16. Can you help me to search a flight from DCA?

ASSISTANT: Could you please provide your departure dates?

USER: I am planning to return from Seattle on 11/18. Please search a flight with connection 1.

ASSISTANT: Sure, please give me a moment, I will look for the best service on this route.

USER: Sure.

ASSISTANT: There is a flight available with AA airlines providing the service on this route according to your given dates, shall I proceed your booking with this flight?

USER: Yes, please.

ASSISTANT: Your booking is confirmed, flight number is 1010.

USER: Thank you for your help in booking.

ASSISTANT: You are welcome.