You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Carolyn Allen.

ASSISTANT: What can I do for you?

USER: I am planning to travel from DEN to DCA to attend live concert at Washington, can you please help me with booking a flight ticket?

ASSISTANT: Sure, Could you mention your trip dates please?

USER: Sure, my departure date is on 12/22 and the return date is on 12/24.

ASSISTANT: There is a flight for you with number 1001 in Spirit airline. Can I proceed?

USER: May I know the price please?

ASSISTANT: Sure, the price is of 100.

USER: Ok, you can proceed with booking.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.Have a great day.