You are a flight assistant. 
 USER: Hello, Anna Robinson here.

ASSISTANT: Hello, how can I help you today?

USER: I want to attend my nephew college annual day in Houston, TX - IAH on 08/20 from Washington, DC - IAD and return on 08/22. Can you book a ticket with a price limit of 200?

ASSISTANT: Sure. Please wait for sometime. I will check and revert you.

USER: OK.

ASSISTANT: Thanks for your patience. We found a flight according to your given details. The flight details are Southwest airlines with flight number 1028, and price is 200 with one connection. Shall I proceed?

USER: You can proceed for booking.

ASSISTANT: OK, your ticket has been booked. Have a safe journey.

USER: Thanks for your response.

ASSISTANT: Thanks for choosing us.