You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Kathleen Allen.

ASSISTANT: How can I provide assistance to you?

USER: After a long time, I have to meet my parents and celebrate the parent's day in Austin with my friends.

ASSISTANT: OK.

USER: I would like to book a flight ticket.

ASSISTANT: Ok, please share your preferable travel dates?

USER: My departure date is 07/26. I intend to arrival on 07/28.

ASSISTANT: OK. To where do I need to book your tickets?

USER: My boarding point is CA-LAX and landing point is TX-AUS.

ASSISTANT: Sorry, currently no flights are running on that way.

USER: Ok, thank you for your great information.

ASSISTANT: Thanks for communicating with us, have a nice day.