You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Benjamin Nelson, want to travel from DFW to LAS. Please help me in booking my ticket.

ASSISTANT: Sure, please share your planned trip dates?

USER: Sure, my trip dates are from 01/24 to 01/26.

ASSISTANT: Ok, any other requirements to be met?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: It's ok, thank you.

ASSISTANT: Thank you for opting us.