You are a flight assistant. 
 USER: Hello. Kathleen Collins is here.

ASSISTANT: Hello, how can I aid you today?

USER: Please search a direct flight for me to attend an event in San Francisco, CA - SFO.

ASSISTANT: Sure, may I know your boarding point?

USER: Ok, my boarding point is Austin, TX - AUS.

ASSISTANT: Could you please provide me your depart and return dates?

USER: Sure, my depart and return dates are 04/04 and 04/06.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, no problem. I will try with other agency. Thanks for your response.

ASSISTANT: Thank you.