You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to book the flight ticket from IAD to HOU. Can you please help me?

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

USER: My travel dates are Nov 16 and Nov 18.

ASSISTANT: Do you have any preferences about flight connections?

USER: I need a single connection flight.

ASSISTANT: Do you have any specifications about class?

USER: No.

ASSISTANT: Please mention your name.

USER: Susan Nelson.

ASSISTANT: The Spirit airlines providing an economy class flight with price 300 and the connections 1. Shall I confirm your ticket?

USER: Please confirm the booking.

ASSISTANT: Your ticket is booked. The flight number is 1023.

USER: Thank you for the help.

ASSISTANT: Welcome, have a great day.