You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Stephanie Wilson. I want to book a flight ticket from Phoenix PHX to Dallas DFW. Can you find a flight ticket for me?

ASSISTANT: Sure, let me know your travel dates please?

USER: Ok, my planned trip dates are on Nov 21 and return on Nov 23.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: Yes, I want to depart in the afternoon time and return in the evening time.

ASSISTANT: Ok, is there any class preference?

USER: No, but I need a single connecting flight.

ASSISTANT: Do you need any airline preference?

USER: No.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for reaching us, have a nice day.