You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Helen Harris. I need to attend a dance program at Chicago, can you please help me to book a flight ticket from DEN to ORD?

ASSISTANT: Sure, can you share your journey dates?

USER: Sure, my travel dates are Sep 12 and Sept 14.

ASSISTANT: Do you have any preferences?

USER: I am looking for a single connection flight.

ASSISTANT: There is a connecting flight with number 1000 in airline UA, the fare is 100 in economy class. Can I book it?

USER: Ok, please proceed.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.