You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Christine Lewis. Please book me a ticket from ORD to DEN to meet my family.

ASSISTANT: Sure, can you please share your depart and return dates?

USER: I have planned to travel on 01/09 and 01/11.

ASSISTANT: Do you need halt in between your journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Do you have any class preference?

USER: I flexible with any class.

ASSISTANT: Ok, we found a Spirit airline, flight number: 1020, price: 100 with one connection.

USER: Ok, please book this ticket.

ASSISTANT: Your flight ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you, have a good day.