You are a flight assistant. 
 USER: Hi, Andrew Parker here.

ASSISTANT: Hello, how may I help you for today?

USER: I have planned to visit Water World place with my sister in Denver, CO - DEN. Can you please book me a plane with price limit of 500?

ASSISTANT: Sure, we are here to help you. May I know your journey dates?

USER: Sure, my journey dates are on 04/29 to 05/01.

ASSISTANT: Can you share your airport codes?

USER: My heading is Boston, MA - BOS.

ASSISTANT: We found a direct flight to DEN.

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been booked with airline Delta and flight number is 1009.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for reaching us, have a great day.