You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from Las Vegas to Washington DC in the month of September, can you help me?

ASSISTANT: Sure, can you tell me your trip dates?

USER: My trip dates will be from 09/26 to 09/28.

ASSISTANT: Ok. may I know your location airport codes?

USER: The location codes are from LAS to DCA. Just make sure if the price is within 200.

ASSISTANT: Sure. Wait a minute. There is a flight available with your request. Shall I proceed?

USER: Then proceed with booking a reservation for me.

ASSISTANT: Ok. Your ticket is booked.

USER: Thanks a lot for helping me.

ASSISTANT: Please tell me your name then I registered your ticket with your name.

USER: Rachel Miller and you are most welcome.

ASSISTANT: Thank you to visit us.

USER: Thank you.