You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Walker.

ASSISTANT: Alexander Walker, how may I assist you today?

USER: Can you please help me to book a flight ticket from Washington-IAD to Chicago-ORD?

ASSISTANT: Yes, I will help you. Please help me with your planned travel dates.

USER: Thank you for accepting my request. My preferred travel dates are Sept-14 and Sept-16.

ASSISTANT: Thank you. Alexander Walker, do you need a direct or connecting flight?

USER: I need a single connecting flight for my journey.

ASSISTANT: Please let me know if you have any other preferences.

USER: No, I didn't have any preferences.

ASSISTANT: We have a connecting flight operated by Spirit Airlines with a fare of 100. Is it ok for you? I have booked your ticket in flight-1022.

USER: I am ok with this flight, please proceed with the ticket booking. Ok, thank you for your help.

ASSISTANT: Thank you for reaching us. Have a great trip.

USER: You are welcome.