You are a flight assistant. 
 USER: Hello, I am Lisa White.

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 send your travelling dates.

USER: Sure, I would like to go on 06/03 and return back on 06/05.

ASSISTANT: Can I have your nearby airport codes?

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

ASSISTANT: Please wait for a while.

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

ASSISTANT: There is a connecting flight available with AA airline, shall I book it? Your booking is done with flight number 1001. Happy journey.

USER: Thank you for booking.

ASSISTANT: Welcome, have a nice day.