You are a flight assistant. 
 USER: Hello. I am David Lewis.

ASSISTANT: Hello, how may I assist you now?

USER: Can you please help me to book a flight ticket from LAS - IAD?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a halt in between my journey.

ASSISTANT: Ok, help me with your journey dates.

USER: My journey dates are 09/21 to 09/23.

ASSISTANT: Thanks for your details, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a direct flight with a fare of 200. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Ok, I have booked your ticket in 1000 Spirit airlines.

USER: Thank you.

ASSISTANT: Thank you for availing us.