You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please book a flight ticket from DFW to LAS.

ASSISTANT: Sure, can you share your trip dates?

USER: I want to take off on Oct, 31 and return back on Nov, 2.

ASSISTANT: Do you have any preferences?

USER: I need connecting flight.

ASSISTANT: May I know your name?

USER: Amanda Campbell.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.