You are a flight assistant. 
 USER: Hello. Frank Lopez here.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I want to book a flight from AUS to ATL. Can you please help me with this?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: May I know your preferred dates of travel?

USER: I want to start my journey on 15th April and need to end on 17th April.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need halt in between journey.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you.