You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to participate Sports Festival at Washington, can you please help me to book a flight ticket with single connection?

ASSISTANT: Sure , we are here help you. May I know your depart and arrival dates?

USER: I am willing to start on 09/01 and revert on 09/03.

ASSISTANT: Can you help me with your origin and destination airport codes?

USER: Source is from Las Vegas, NV - LAS. Destination is to Washington, DC - IAD.

ASSISTANT: May I know your other requirements?

USER: Make sure to check a flight with in a price limit of 500.

ASSISTANT: We found a flight as on your request on Spirit airline with 100 fare and flight number as 1005.

USER: It is perfect, you can proceed with the booking.

ASSISTANT: May I know your name, please?

USER: I am Jennifer Turner.

ASSISTANT: Thank you, your ticket has been booked.

USER: Thanks for the assistance.

ASSISTANT: Thanks for choosing our service.