You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I have a live music concert at Washington, please help me in booking a ticket from DEN to IAD.

ASSISTANT: Sure, may I know your travelling dates?

USER: My planned journey dates are on Apr 20 and Apr 22.

ASSISTANT: Can you please share your connection limit?

USER: I need a flight with single connection.

ASSISTANT: May I know your depart time and return time?

USER: I would like to return in the morning. I prefer an economy class.

ASSISTANT: Do you have any other requirements?

USER: No more specifications.

ASSISTANT: May I know your name please?

USER: My name is Carol Adams.

ASSISTANT: We found a Spirit airline, flight number: 1013, return time: 7:00AM, price: 100 with one connection.

USER: Ok, please proceed for booking.

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

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.