You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am looking to book a flight ticket from LGA to ORD. Can you help me for that?

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

USER: My travelling dates are Sep 17 and Sep 19.

ASSISTANT: Do you have any specifications?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: The Southwest airline is providing an economy class flight with price 100 and the connections 1. The departure time is 11:00 AM and return time is 21:00 PM. Shall I confirm your ticket?

USER: OK, proceed for booking.

ASSISTANT: Please provide your name.

USER: My name is Dorothy Walker.

ASSISTANT: Your ticket is booked. The flight number is 1003.

USER: Thank you for booking.

ASSISTANT: Welcome, have a great day.