You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I intend to visit tourist attractions in Washington DC so, please book a flight ticket under 500 fare.

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Ruth Hall is my name.

ASSISTANT: Let me know your trip dates.

USER: My trip dates are 04/09 and 04/11.

ASSISTANT: Could you please share your airport codes?

USER: My source and destination airport codes are WA - SEA and DC - DCA.

ASSISTANT: Please, wait.

USER: OK.

ASSISTANT: There is a flight with airline: UA, flight number:1006, price 200, 1 connection. Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.