You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I would like to travel from Seattle to celebrate my mother's birthday at Washington. Can you help me book direct flight?

ASSISTANT: Sure, I can help you. Please share me your airport codes.

USER: My journey is from SEA to DCA.

ASSISTANT: May I know your name?

USER: Jeffrey Hill is my name.

ASSISTANT: Can I know your travelling dates?

USER: I will depart on 11/26 and return on 11/28.

ASSISTANT: We found a AA airline, flight number:1001 and the price is 200.

USER: You can proceed for booking with this airline.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your assistance.

ASSISTANT: Thank you for picking us.