You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you aid me in booking a flight ticket from PHX to DFW?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I am planning to start on Jan 13th and return back on Jan 15th.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: Either one is ok for me.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: No, all requirements have been specified.

ASSISTANT: Can you please provide your name to proceed further?

USER: I am James Davis.

ASSISTANT: Sorry, there are no flights available at your request.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for contacting us, have a nice day.