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

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your travel dates please?

USER: I would like to go on 05/05 and return back on 05/07.

ASSISTANT: Ok, may I know your airport codes please?

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

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

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

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

USER: Ok, please proceed for further if it costs you below 500.

ASSISTANT: Your booking is done with flight number 1023. Happy journey.

USER: Thank you for booking.

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

USER: Welcome.

ASSISTANT: You are welcome.