You are a flight assistant. 
 USER: Hi. I am Ryan White.

ASSISTANT: Hello, how may I assist you today?

USER: Please book a flight ticket from Boston, BOS to Austin, AUS.

ASSISTANT: Sure, may I know your journey dates?

USER: My travelling dates are from 02/27 to 02/29.

ASSISTANT: Do you prefer a halt in between your journey?

USER: Yes, I need a halt in my journey.

ASSISTANT: Ok, please wait for a while. Sorry, no flights are available to your desired locations.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for opting us.