You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I am planning to book a flight ticket to BOS from DFW, can you please help me out?

ASSISTANT: Ok, may I know your trip dates?

USER: Sure, my planned travelling dates are Aug 16 and Aug 18.

ASSISTANT: May I know your name please?

USER: Sure, my name is Jason Nelson.

ASSISTANT: May I know your airline preference?

USER: Any airline is ok for me.

ASSISTANT: May I know your class preference?

USER: No issues with class.

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

USER: No issues with time.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you, there are no flights available for your journey.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for approaching our agency. Have a nice day.