You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I want to book a flight ticket to Washington with price under 500. Can you help me with it?

ASSISTANT: Sure, can you help me with your journey dates?

USER: Journey dates are 10/13 and 10/15.

ASSISTANT: May I know your airport codes?

USER: Airport codes are LAS-DCA.

ASSISTANT: May I know your name?

USER: My name is Carol Robinson.

ASSISTANT: A flight with price 200 having single connection is found in UA airline. Shall I proceed with it?

USER: Yes, you can proceed.

ASSISTANT: Your ticket is confirmed in flight number 1012.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.