You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a direct flight ticket to attend an emergency case at NV. Can you help me?

ASSISTANT: sure, I am here to help you out. May I know your travelling dates please?

USER: Oct 04th and 06th are my trip dates.

ASSISTANT: Can you please share your airport codes?

USER: AUS and LAS are my airport codes.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: Myself Justin Taylor.

ASSISTANT: Justin Taylor, there are no flights available in your route.

USER: No issue, Thank you for the information.

ASSISTANT: Thank. you for choosing us.