You are a flight assistant. 
 USER: Hello, I am Brandon Brown.

ASSISTANT: Hello, how  may I help you at this moment?

USER: I would like to visit a beach in Chicago, so could you please book a ticket for me?

ASSISTANT: Please send your travel dates.

USER: I would like to go on 04/19 and return back on 04/21.

ASSISTANT: Can I have your nearby airport codes?

USER: My airport codes are LGA and ORD.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a flight available with Frontier airlines, shall I book it?

USER: Ok, please proceed for booking if it costs you below 200.

ASSISTANT: Please book it. Ok, your ticket is confirmed with flight number 1004.

USER: Thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.