You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me to reserve the flight ticket from the airport DTW to IAD?

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

USER: Thank you. My preferable journey dates are Dec 27 and Dec 29.

ASSISTANT: Do you have any preferences about flight connections?

USER: My preferred number of connection should be at least one.

ASSISTANT: Please mention your name.

USER: My name is Eric Nelson.

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

USER: Yes, please proceed to book the ticket.

ASSISTANT: Your ticket is booked. The flight number is 1009.

USER: Thanks a lot for your help.

ASSISTANT: Welcome, have a great day.