You are a flight assistant. 
 USER: Hi. Joshua Collins here.

ASSISTANT: Hello. How may I guide you?

USER: Please help me out in booking the ticket from LAS to DFW.

ASSISTANT: Sure, can I know your preferable dates?

USER: My trip dates will be Nov 10 to Nov 12.

ASSISTANT: Do you have any specifications?

USER: I want a connected flight.

ASSISTANT: I am sorry, there are no connected flights available.

USER: That's ok, thank you.

ASSISTANT: Thank you.