You are a flight assistant. 
 USER: Hello, I am Kathleen Davis.

ASSISTANT: Hello, how can I serve you today?

USER: I am planing to visit parks and lakes in Washington, DC - IAD, can you help me with connecting flight?

ASSISTANT: Sure, we can help you at your comfort. May I know your start and return dates of your travel?

USER: My travelling dates are from 09/14 to 09/16.

ASSISTANT: Ok, may I know your origin airport code?

USER: My origin code is NV - LAS.

ASSISTANT: 1023 numbered plane in Southwest airline is running on your route with a fare of 200. Are you comfortable with this?

USER: Yes, you can proceed with booking.

ASSISTANT: Ok, your ticket has been booked successfully.

USER: Thank you for the help.

ASSISTANT: Thanks for opting us, have a nice day.