You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket from EWR to AUS. Could you help me in booking?

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

USER: My travelling dates are form Apr 16 - 18.

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

USER: I prefer for connecting flight.

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

USER: No.

ASSISTANT: May I know your name for the documentation purpose?

USER: Dorothy Robinson.

ASSISTANT: Sorry, no flights are available on your specified dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Welcome, thank you for reaching us.