You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in booking my flight from DCA to reach SEA?

ASSISTANT: Let me know your travel dates.

USER: My planned travelling dates are Sep 22nd and Sep 24th.

ASSISTANT: Is there any airline preference?

USER: I would prefer any standard airlines.

ASSISTANT: Do you have any class preference?

USER: I am comfortable in any class.

ASSISTANT: Let me know your departure and arrival timings.

USER: I don't have any specific timings for my departure and arrival.

ASSISTANT: Can I know your name?

USER: My name is Stephen Robinson.

ASSISTANT: Connecting flight can be booked with American airlines for price 200 having flight number 1005.

USER: Yes, you can proceed by booking.

ASSISTANT: Ticket is booked.

USER: Thanks for the help.

ASSISTANT: Thank you.