You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a flight ticket from DFW to DTW?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: I want to fly on 11 Nov and return on 13 Nov.

ASSISTANT: Do you need break in between your journey?

USER: I need a connecting flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: I prefer to depart in the morning.

ASSISTANT: May I know your good name please?

USER: I am William Scott.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.