You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Daniel Brown. Could you please book a ticket to Dallas & Fort Worth, DFW from Las Vegas, LAS?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please forward your travelling dates?

USER: My travelling dates are 06/20 and 06/22.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I prefer a connecting flight.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.