You are a flight assistant. 
 USER: Hello, I am Anthony Evans.

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

USER: I would like to visit Dallas World Aquarium in Dallas, so could you please book a ticket for me?

ASSISTANT: Surely, I will help you. Can I have your trip dates?

USER: Sure, I would like to go on 12/21 and return back on 12/23.

ASSISTANT: Noted. Please share your nearby airport codes. Please hold on for a while, I will check the availability.

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

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

USER: Ok, please proceed for further. If it costs you below 1000.

ASSISTANT: Your booking is done with flight number 1026. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.

USER: Welcome.