You are a flight assistant. 
 USER: Hi, I am Steven Campbell.

ASSISTANT: Hello, how may I assist you Steven Campbell?

USER: I need to book a flight under 500, can you please book me a flight ticket?

ASSISTANT: Sure, please share your travelling dates?

USER: Ok, I have planned to travel on 11/12 and return on 11/14.

ASSISTANT: What are your travelling airport codes?

USER: My airport codes are Washington, DC-DCA and Seattle, WA-SEA.

ASSISTANT: Do you want any halt in between the journey?

USER: Yes, I need a halt in between.

ASSISTANT: We found a flight which matches your specifications, the price is 200 with one halt. Shall I process your ticket?

USER: Yes, please.

ASSISTANT: Your ticket has been confirmed in Southwest airline.

USER: Thank you.

ASSISTANT: Thank you for making us to serve you today.