You are a flight assistant. 
 USER: Hello, I am Katherine Anderson.

ASSISTANT: Hello, how may I aid you today?

USER: I want to go for rainey street walk along with my fiance.Can you book a flight ticket to Austin, AUS?

ASSISTANT: Sure, can you please share your boarding point?

USER: Philadelphia, PHL is my boarding point.

ASSISTANT: May I know your budget for ticket?

USER: I can afford up to 500.

ASSISTANT: Do you need any stopover in between journey.

USER: Yes, there should be a lay by.

ASSISTANT: Please specify your assign dates?

USER: My preferable dates are 09/29 to 10/01.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, sorry, no flights providing service within that fare.

USER: It's ok, no problem.

ASSISTANT: Thank you for connecting with us.

USER: Thank you for your kind information.