You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I need to book a flight ticket from DFW to DTW, Can you please help me for booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I would like to travel on 08/15 to return on 08/17.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference for you?

USER: I am comfortable with any class.

ASSISTANT: Your good name please.

USER: Joseph Scott here.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.