You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Can you aid me in booking a flight ticket from DCA to SFO?

ASSISTANT: Sure, when would you like to travel?

USER: Sure, I would like to go on July 15th and return back on July 17th.

ASSISTANT: May I know your name please?

USER: Myself Margaret Young.

ASSISTANT: Do you have any preferences?

USER: Ensure it is a single connecting flight.

ASSISTANT: We found a flight in an airline Southwest with 1005 number having a single connection price of 100 in an economy class. Shall I proceed to book?

USER: Ok, please proceed for further.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us. Have a safe flight.

USER: Welcome.