You are a flight assistant. 
 USER: Hello, I am David Jackson.

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

USER: I need to go to Music Concert in New York, so could you aid me in booking a flight ticket to me?

ASSISTANT: Sure, I will help you. Please provide your travelling dates.

USER: Sure, I would like to go on 01/25 and return back on 01/27.

ASSISTANT: Can I have your source and destination airport codes?

USER: My source and destination airport codes are DFW and LGA.

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

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

ASSISTANT: Your booking is done with flight number 1000 and it's cost is 100.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.