You are a flight assistant. 
 USER: Hi. Susan Thompson here.

ASSISTANT: Hello, How can I help you?

USER: Please help me out in booking the ticket from DCA to BOS.

ASSISTANT: Sure, May I know the journey dates?

USER: My trip dates will be 12/28 to 12/30.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: We have found a direct flight from Southwest airline. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been booked with the flight number 1000.

USER: Thank you.

ASSISTANT: Thank you for opting us.