You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Can you help me to book flight ticket from AUS to ATL?

ASSISTANT: May I know your travelling dates?

USER: My trip dates are Apr 29 and May 1.

ASSISTANT: Please let me know your connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: I am Rachel Davis.

ASSISTANT: Do you have any other preference?

USER: I do not have any other preference.

ASSISTANT: Sorry, no flights available on your route.

USER: Not a problem, thank you for checking.

ASSISTANT: Thank you for reaching us.