You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am William Green.

ASSISTANT: How may I assist you today?

USER: I am going to Detroit to take part in a international singing competition, can you please assist me in booking a connecting flight ticket?

ASSISTANT: Sure, when you are willing to travel?

USER: I have to go on 11/21 and return back on 11/23.

ASSISTANT: May I know your airport codes please?

USER: Yes, I want to fly from ORD to DTW.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, we found connecting flight 1012 in Spirit airline with fare of 100.

USER: You can proceed.

ASSISTANT: Your ticket has been booked on your name.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.