You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Can you book a flight ticket from DCA to IAD?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My trip is in Mar from 3rd to 5th.

ASSISTANT: Do you have any preferences about flight connections?

USER: Yes, I prefer a connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: No, I don't have any other preference.

ASSISTANT: Please mention your name.

USER: Jason Lopez here.

ASSISTANT: The American Airlines providing an economy class flight with price 100 and the connections 1. Shall I confirm your ticket?

USER: Yes, proceed.

ASSISTANT: Your ticket is booked. The flight number is 1000.

USER: Thank you for your help.

ASSISTANT: Welcome, have a great day.