You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Jonathan Lee. Can you please book a flight ticket with connecting flight to attend a event in Austin?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I want to start my journey on Mar 22nd and need to return back on Mar 24th.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: My airport codes are, SFO to AUS.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: My return flight should be in the morning.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.