You are a flight assistant. 
 USER: Hello, I am Gary Lewis.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, I will help you. Can you share your travelling dates?

USER: Sure, I would like to go on 06/13 and return back on 06/15.

ASSISTANT: Please provide your nearby airport codes.

USER: My source and destination airport codes are LAX and HOU.

ASSISTANT: Please wait for a while.

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

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 200.

ASSISTANT: Your booking is done with flight number 1006. Happy journey.

USER: Thank you for booking.

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

USER: Welcome.