You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I need you to book a flight ticket from DTW to DEN. Please help me.

ASSISTANT: Sure, please share your itinerary dates.

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

ASSISTANT: May I know your name?

USER: Paul Brown.

ASSISTANT: Which class do you prefer?

USER: I am comfortable to fly in any class.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: AA airlines with flight 1003 is providing a connecting flight and ticket costs you 100 in economy class.

USER: Ok, please book the ticket in this flight.

ASSISTANT: Your ticket is confirmed Paul Brown. Flight departs at 10:00 hours and arrives at 15:00 hours.

USER: Thank you.

ASSISTANT: Thank you for reaching us.