You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Gregory Brown, I want you to book the ticket from SFO to DCA. Because I have to attend a concert in Washington-DC.

ASSISTANT: May I know your travelling dates please?

USER: I have to depart on 03/25 and return on 03/27.

ASSISTANT: There is a flight with single connection, can I proceed for booking in 1019 flight?

USER: Yes, you can proceed.

ASSISTANT: Your booking is done in Southwest airlines.

USER: Thank you very much for your help.

ASSISTANT: Thank you for choosing us.