You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I need you to book a flight ticket from DEN to ORD.

ASSISTANT: Sure, please share me your class preference?

USER: I prefer to fly in a economy class.

ASSISTANT: May I know your connection limit?

USER: I need a break in my journey.

ASSISTANT: Please share me your planned journey dates?

USER: June 21 and 23 are my planned travelling dates.

ASSISTANT: Do you have any other requirement?

USER: I wish to return in the evening.

ASSISTANT: May I know your good name?

USER: My name is Jennifer Lewis.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, I found a connecting flight 1027 of airline Spirit, fare is 100 and class is economy. Shall I proceed with booking?

USER: Please book the ticket.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us. Have a nice journey.