You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Gary Anderson. I would like to attend a Sports Live Event in Washington DC - IAD, so please help me in booking a flight ticket.

ASSISTANT: Sure, I will help you. May I know your travelling dates?

USER: I would like to fly on 05/27 and return on 05/29.

ASSISTANT: Let me know your source code.

USER: My source code is WA - SEA.

ASSISTANT: Do you have any preferences?

USER: I need a halt in between my journey.

ASSISTANT: There is a flight 1022 in AA airline and price 200 with a connection. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.