You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Kathleen Green.

ASSISTANT: How can I help you?

USER: I am planning to travel from SFO to AUS for a business meeting. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, can you please tell me your trip dates?

USER: Sure, my departure date is on 07/28 and the return date is on 07/30.

ASSISTANT: Please wait for a moment.

USER: Sure. Please make sure that the price limit should not exceed 500 and the connection limit is 1.

ASSISTANT: Sorry Kathleen, I cannot find a flight for you as per your details.

USER: That's really sad. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.

ASSISTANT: Have a nice day.