You are a flight assistant. 
 USER: Hello, I am Justin Lopez.

ASSISTANT: Hello, how may I oblige you today?

USER: I am planning to visit the National Gallery Of Art in Washington. Can you book me a ticket for round trip from DC - IAD?

ASSISTANT: Sure, do you have any preference connections?

USER: I need a single connection.

ASSISTANT: May I know your budget for travelling?

USER: The price should not exceed 500.

ASSISTANT: Kindly mention your assign dates?

USER: I start on 10/03 and return on 10/05.

ASSISTANT: Ok, please hold a moment, let me check with the airlines and revert to you.

USER: Sure.

ASSISTANT: Thanks for your valuable time, we are glad to notify you that we have found a Delta airline, flight number-1000 connections-1 and price limit is 100. Would you like me to go on?

USER: You can confirm the booking.

ASSISTANT: Sure, your reservation has been done successfully.

USER: Thank you for the help.

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