You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Larry Brown from San Francisco. I am planning to watch sports live events in Washington, so please book a flight ticket from CA - SFO to DC - DCA.

ASSISTANT: Sure, We are here to help you. When are you planning to make your trip?

USER: I will start on 08/10, return on 08/ 12.

ASSISTANT: Please let me know your connection limit.

USER: Connection limit is one.

ASSISTANT: We found  a AA airline, flight number:1005 and the price is 100.

USER: You can reserve it.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your good service.

ASSISTANT: Thank you for opting us.