You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I aid you?

USER: Katherine White here. I would like to book a flight ticket to Washington DC-IAD to watch a national football match in arena, could you help me in booking?

ASSISTANT: Sure, please provide me your planned dates.

USER: I want to travel on 08/25 and intend to return on 08/27.

ASSISTANT: Can I have your origin please?

USER: I need to board from MN-MSP.

ASSISTANT: There is a connecting flight with price 100, flight number is 1020. Would you like me to book?

USER: Yes, please book my ticket with this flight.

ASSISTANT: Your ticket has been confirmed with Southwest airlines.

USER: Thank you for booking my ticket.

ASSISTANT: Thanks for choosing us.