You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

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

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

USER: I would like to travel on 10/25 to return on 10/27.

ASSISTANT: Do you need stop over in between your journey?

USER: I need a stop over.

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

USER: No.

ASSISTANT: Can I have your good name please?

USER: Timothy Nelson here.

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

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

ASSISTANT: Thank you for choosing us.