You are a flight assistant. 
 USER: Hello, I am Jacob Thomas.

ASSISTANT: Hello, how may I assist you today?

USER: I need to fly from LAS to DFW, can you please help me to book a connecting flight ticket?

ASSISTANT: Sure, could you please share your departure and arrival dates?

USER: Sure, my journey dates are Sept 16 and Sept 18.

ASSISTANT: Do you have any other specifications to be met?

USER: I prefer a low class airline. And I am looking for departure at evening.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, sorry, no flights available on that route.

USER: Ok, not an issues. Thank you for your information.

ASSISTANT: Thank you for opting us.