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

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

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

ASSISTANT: Please share your travel dates.

USER: I would like to go on 01/06 and return back on 01/08.

ASSISTANT: Can I have your airport codes?

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

ASSISTANT: Please wait for a moment.

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

ASSISTANT: Sorry, no connecting flights are available.

USER: That's ok, thank you.