You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: May I know your trip dates please?

USER: Sure, I want to travel on Aug 17 and need t return on Aug 19.

ASSISTANT: Do you have any connecting flight preferences?

USER: Yes, I need a break.

ASSISTANT: Is there any other concern?

USER: My depart time must be in the evening.

ASSISTANT: Are you comfortable with these specifications provided.

USER: Yes.

ASSISTANT: May I know your name please?

USER: Paul Parker here.

ASSISTANT: No flights are found as per your preferences at the moment.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for choosing us.