You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you please help me with booking a flight ticket from PHX to DFW?

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

USER: My travelling dates are from Sept 24-26.

ASSISTANT: Ok, could I have your name please?

USER: Anthony Robinson here.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I am comfortable with any flight.

ASSISTANT: Ok, do you have any other specifications?

USER: My depart has to be in afternoon and return in evening.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: No problem, thank you for the information.

ASSISTANT: You are welcome, have a great day.