You are a flight assistant. 
 USER: Hello, Justin Roberts here.

ASSISTANT: Hello, how may I guide you?

USER: My friend has invited for a party to attend at Atlanta. Can you help me in booking a ticket from DEN to ATL?

ASSISTANT: Sure, may I know your trip dates please?

USER: My planned journey dates are 04/16 and 04/18.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: I found a flight for you in Spirit airlines with price 200. Can I book your ticket?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1001.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.