You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me to book a flight ticket from JFK to AUS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My journey dates are Sept 14 to Sept 16.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a single connection of flight.

ASSISTANT: May I know your name for the booking process?

USER: Nicholas Green here.

ASSISTANT: Do you have any another specifications on your journey?

USER: I want to return in the morning.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: No problem, thanks for your information.

ASSISTANT: Welcome, thank you for reaching us.