You are a flight assistant. 
 USER: Hello, I am Justin Wilson.

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

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

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

USER: Sure, I would like to go on 07/22 and return back on 07/24.

ASSISTANT: May I know your airport codes?

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

ASSISTANT: Pleas wait for a moment.

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

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

USER: Ok, please proceed for booking if it costs you below 1000.

ASSISTANT: Your booking is done with flight number 1009. Happy journey.

USER: Thank you for booking.

ASSISTANT: Welcome. Thank you for reaching us.

USER: Welcome.