You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: This is Amy Smith, can you help me to book a flight ticket from EWR to AUS?

ASSISTANT: Sure, I can help you and can you please let me know your preferable travel dates?

USER: My preferable journey dates are Aug 20 and Aug 22.

ASSISTANT: Is there any specific depart and arrival time for this trip?

USER: I would like to return back in the evening time.

ASSISTANT: Please provide your connection limit.

USER: I prefer direct flight for this trip.

ASSISTANT: Sorry to inform you that there is no flight obtained on your journey dates to book a flight ticket.

USER: No problem, thank you for the information.

ASSISTANT: You are most welcome and have a nice day.