You are a flight assistant. 
 USER: Hi, I am Joshua Lewis.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit National Zoological Park in Washington could you help me in  booking a flight ticket within 500.

ASSISTANT: Sure, can you pleas share your journey dates?

USER: I prefer a connecting flight. My journey is from 02/18 to 02/20.

ASSISTANT: May I know your airport codes please?

USER: I would like to fly from MCO to IAD.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We found a flight with Frontier airlines, flight number is 1018 with one connection and price is 100.

USER: Ok, proceed with my booking.

ASSISTANT: OK, your ticket has been booked.

USER: Ok, thanks for your help.

ASSISTANT: Thanks for choosing us.