You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Thomas Edwards.

ASSISTANT: How can I assist you today?

USER: I am planning to visit Millennium Park at Chicago, could you please help me with booking a flight ticket from AUS to ORD?

ASSISTANT: Sure, can you please share your travel dates?

USER: I would like to take off on 08/19 and return on 08/21.

ASSISTANT: Let me check for the availability of flight.

USER: Sure, take your time. Make sure the connection limit should be 1.

ASSISTANT: Thomas, I am sorry to inform you that there is no flight available at your request.

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for contacting us.