You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Betty Lopez, want to visit Korean war veterans memorial which is at Washington, DCA. Can you please book a flight ticket for me?

ASSISTANT: Sure, may I know your source airport code please?

USER: My boarding point is Las Vegas, LAS.

ASSISTANT: What are your planned dates for travelling?

USER: I want to fly on 12/29 and return on 12/31.

ASSISTANT: Flight-1006 from Southwest airlines is ready to serve you with travel charge of 100 and 1 connection. Shall I proceed booking?

USER: Yes, you can proceed to reserve.

ASSISTANT: Your ticket has been booked, have a safe flight.

USER: Thank you for assisting me.

ASSISTANT: Thank you for choosing us.