You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Gary Robinson here. I would like to meet my brother at Washington. Can you help me in booking a ticket from LAX to DCA?

ASSISTANT: Sure, tell me your travel dates please?

USER: Ok, my preferable journey dates are 09/09 and 09/11. Please check for a direct flight.

ASSISTANT: Thanks for your patience. I have found southwest airlines which flies with one connection. Sorry it is a zero connection flight.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you.