You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need you to book a flight ticket from DTW to PHL, please help me.

ASSISTANT: Can I know your trip dates?

USER: September 19 and 21, are my planned travelling dates.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need a break in between my journey.

ASSISTANT: Is there any other specifications?

USER: Nothing much to state.

ASSISTANT: May I know your name for reservation?

USER: Dennis Jackson here.

ASSISTANT: There are no flights available on your routes.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.