You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you for the day?

USER: Please could you book a ticket from Washington DC-IAD to Las Vegas, NV-LAS.

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: Travel dates are from 04/24 to 04/26.

ASSISTANT: May I know your good name?

USER: I am Donna Scott.

ASSISTANT: We found 1017 Spirit airlines with single connection with price 200. Shall I proceed with the booking?

USER: Please provide direct flight.

ASSISTANT: Sorry, we have no direct flights on your given dates.

USER: Thanks for the assistance.

ASSISTANT: Thank you for reaching us.