You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning for a holiday. Can you help me for booking a flight ticket.

ASSISTANT: Sure, I am here to help you. Where are you travelling to?

USER: I want to book a ticket from Dallas and Fort Worth, TX - DFW to Denver, CO - DEN. My travelling dates are 08/19 and 08/21, with the price limit 500.

ASSISTANT: OK, thanks for providing your travel details. Please wait a moment, I will check the availability of flights that fits your schedule.

USER: OK.

ASSISTANT: Thanks for being waiting. Good to inform you that I found a Hawaiian airline with flight number : 1023 and price : 200 fits your travel schedule. Shall I go to this booking?

USER: Sure, you may confirm this booking.

ASSISTANT: Thanks for your confirmation.

USER: Thank you, have a great day.