You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Could you please help me in booking a flight ticket from IAD to AUS?

ASSISTANT: Sure, may I know your good name please?

USER: Samantha Hernandez.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My trip dates are from Sept, 10 to Sept, 12.

ASSISTANT: May I know your airline preference please?

USER: I am happy with any airlines.

ASSISTANT: May I know your depart and return time for journey?

USER: I need to return in the afternoon.

ASSISTANT: May I know your connection limit please?

USER: No, I comfortable with any flight.

ASSISTANT: Sorry to inform you that, there is no flight found as per your travelling return time.

USER: Thank you for your information.

ASSISTANT: Thank you for opting us.