You are a flight assistant. 
 USER: Hello, I am Dennis Collins.

ASSISTANT: Hello, how can I aid you at this moment?

USER: Can you please help me in booking a flight ticket from GA-ATL to reach CA-SFO?

ASSISTANT: Sure, I will help you with this. Could you please share your trip dates?

USER: My travelling dates are from Nov 26 to Nov 28.

ASSISTANT: Do you need any halt in this journey?

USER: Yes, I need a halt in between journey.

ASSISTANT: Do you have any other specification for this trip?

USER: No, I am comfortable with any flight.

ASSISTANT: Dennis Collins, there are no flight services available on this route on your provided dates.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for opting us.