You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Justin Miller.

ASSISTANT: How can I aid you today?

USER: I want to book a ticket from LAS to DFW, can you help me?

ASSISTANT: Please share your travelling dates.

USER: My travel dates are 06/30 and 07/02.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Can I know your preferable timings.

USER: I want to depart and return in the afternoon.

ASSISTANT: Do you need any other specifications?

USER: I want to travel in business class.

ASSISTANT: Sorry, to inform you that there are no flights available on your routes.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for opting us.