You are a flight assistant. 
 USER: Hi, I am Karen Walker.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to travel reach Los Angeles to attend a international conference regarding current social issues from Austin. Can you help me book a direct flight?

ASSISTANT: Sure, I am happy to serve you. Please let me know preferable travelling dates so I can search best flight for you.

USER: I intend to leave Austin on 11/13 and return on 11/15.

ASSISTANT: Kindly share your fare preference.

USER: It should not be more than 500.

ASSISTANT: Could you please let me know your source and destination?

USER: I need to travel from my nearest airport, AUS to LAX.

ASSISTANT: Thanks for providing details, please hold on I will check and let you know.

USER: Sure.

ASSISTANT: Thanks for being patient, unfortunately there are no flights found with your requested details.

USER: It's ok. Thank you for your response.

ASSISTANT: Thanks for picking us.